Pretty easy questions. One can believe that people came from two common ancestors and not believe in evolution with no conflict. You would first have to define what you mean by "evolution," as it is used in wildly different meanings. If you mean change or adaptability, then such a belief would be hard to reconcile. If you mean the theory of human origin, then the difference between 3 or 4 skin colors and all of us evolving from lower life forms is obviously two different things and the former is not in conflict while the latter would be.
The second question is based on a shoddy premise. Your implication is that we have to meet someone before we know what their name is. Now, suppose an alien were to land and leave the earth before anyone saw him, but while he was here he left a photograph of himself with his name spelled in English. Even though no human would meet him, we would know what his name is, no? Also, the teaching is merely that no human has met God, not that no person has met God. People have met angels in the Bible who can be assumed to have met God. Pretty simple, no?