Here are replies from a Trinitarian perspective:
IF JESUS IS GOD…
1. Why is he called the “firstborn” of all creation? (Col. 1:15; Rev. 3:14)
Because prototokos (translated "firstborn") means "pre-eminent", not "first created." See the Col. 1:16 for the context. It doesn't say, firstborn because in that he was the first thing created. It says firstborn (pre-eminent) in that by Him all things in heaven and earth were created."
2. Why did he say that he did not come of his “own initiative” but was sent? (John 8:42; 1 John 4:9)
Because he was sent. The Father and the Son have different roles. The Father sent him.
3. Why did Jesus not know the “day and the hour” of the Great Tribulation but God did? (Mt. 24:36)
Because he limited himself when he became a man (see Philippians 2). He was not omnipresent, for example. He became hungry and thirsty, for example.
4. Who did Jesus speak to in prayer? (Mt. 26:36)
The Father.
5. How did he “appear before the person of God for us”? (Heb. 9:24)
The Trinity doctrine states that three Persons are God. Jesus stood before God the Father for us.
6. Why did Jesus say “the father is greater than I am”? (John 14:28; Phil. 2:5, 6)
Because when he became a man, Jesus became lower than the angels for the suffering of death. Hebrews 2:7.
7. Who spoke to Jesus at the time of his baptism saying “this is my son”? (Mt. 3:17)
The Father.
8. How could he be exalted to a superior position? (Phil. 2:9, 10)
Because when he became a man, he was made lower than the angels for the suffering of death.
9. How can he be the “Mediator between God and Man”? (1Tim. 2:5)
Because He is both God and man.
10. Why did Paul say “the head of Christ is God”? (1Cor. 11:30)
Because Christ is both God and man, and Paul was referring to God the Father. The Father and Son are of the same ontological essence but have different roles.
11. Why did Jesus “Hand over the Kingdom to his God” and “subject himself to God”? (1Cor. 15:24, 28)
Because Christ is both God and man and the Father and Son have different roles.
12. Who does he refer to as “my God and your God”? (John 20:17)
The Father. Jesus became a man. As such, the Father was his God.
13. How does he sit at God’s right hand? (Ps. 110:1; Heb. 10:12, 13)
Three Persons. Same essence. Different roles.
14. Why does John say “no man has seen God at any time”? (John 1:18)
Interesting question, given that Exodus 24:10 says that Moses and 70 elders went up the mountain "and saw the God of Israel." The entire quote in John says that no man has seen God at any time but that the Son has revealed him. No man has seen the entire Trinity at any time, but they have seen the Son, who is God.
15. Why did not people die when they saw Jesus? (Ex. 30:20)
For the same reason that Moses and the 70 elders did not die when they saw the God of Israel. It's not automatic.
16. How was Jesus Dead and God alive at the same time? (Acts 2:24)
Because death of a human being does not extinguish his soul or his spirit as the WT believes.
17. Why did he need someone to save him? (Heb. 5:7)
The reference is to saving him from death, not to saving him from sins. As a man, Jesus was able to die and entrusted himself totally to the Father. The Father and Son have different roles.
18. Who is referred to prophetically at Proverbs 8:22-31?
It is not a prophecy. It is Hebrew poetry about wisdom.
19. Why did Jesus say “that all authority has been GIVEN to me in heaven and on earth”? (Mt. 4:11; Dan 7:13, 14)
Because as a man, Jesus was made lower than the angels for the suffering of death. As such, he depended solely on the Father.
20. Why did he have godly fear? (Heb. 5:7)
Because he was also a man. Godly fear doesn't mean cringing. It means the sort of reverence a man should have for God, and Jesus was fully human as well as fully divine.
21. How could he learn obedience and be made perfect? (Heb. 5:8, 9)
Because he had a human as well as a divine nature, because he was made lower than the angels for the suffering of death, and as a human being he had to learn as we all do.
22. Why would an angel be able to strengthen him or angels minister to him? (Luke 22:43; Mt. 4:11)
Because Jesus was also a man.
23. Why would Satan try to tempt him if he KNEW that he was GOD? (Mt. 4:1-11)
Because Jesus was also a man.
24. Jesus when sent to the earth was made to “be Lower” than the angels. (Heb. 2:7) How could any part of a God Head EVER be lower than the angels he created?
Ontologically, he was not lower than the angels. In Hebrews 1:6, the Father commanded the angels to worship Jesus even though POSITIONALLY Jesus was lower than the angels because he humbled himself. Analogy: The TV show "Undercover Boss" where the CEO temporarily works under the authority of those who are lower in rank than he.
25. If Jesus was the same as God, who was he being tempted to rebel against? Could God be tempted to rebel against himself? (Mt. 4:1)
Against the Father. The Son is not the same Person as the Father.
26. Near the end of his earthly life, Jesus cried out “My God, why have you forsaken me?” (Mt. 27:46) Can God desert or forsake himself?
The Son is not the same Person as the Father. They have different roles. As a man, Jesus was identifying with his ancestor David who wrote those words centuries earlier. See Psalm 22:1.
27. (Heb. 5:8) says that Jesus learned obedience! To whom would he obey if he was GOD? And does God need to learn anything?
The Son would obey the Father. They are not the same Person. They have different roles. When Jesus became a human being, he set aside the independent exercise of his attributes as God and had to learn things as all humans do.
28. God’s justice is strictly perfect. (Ex. 21:23-25) The ransom price was one perfect human for another. An imperfect man’s life would be too low. (Ps. 49:7) If Jesus was the same as God, the ransom price paid by a God would have been too high. Adam was a perfect MAN and the ransom price was a perfect MAN, not higher or lower.
This is WT reasoning, but it's not biblical.
Jesus was more than a perfect man. Did Adam ever walk on water, heal the blind, feed 5000, or raise the dead?
Jesus was one man, yet his ransom didn't simply pay the price for one man to be redeemed. His sacrifice pays the price for as many as will receive him. His death did not atone for Adam's sins alone, but is broad enough to cover our personal sins as well. The WT is wrong in his soteriology. Jesus is far MORE than a perfect counterpart to Adam:
Romans 5:15-17: "15 But the free gift is not like the trespass. For if many died through one man's trespass, much more have the grace of God and the free gift in the grace of that one man Jesus Christ abounded for many. 16 And the free gift is not like the effect of that one man's sin. For the judgment following one trespass brought condemnation, but the free gift following many trespasses brings justification. 17 If, because of one man's trespass, death reigned through that one man, much more will those who receive the abundance of grace and the free gift of righteousness reign in life through the one man Jesus Christ."