Greetings Borgfree: Yes, all scripture at the time of the apostles was contained in the OT; however, not everything in the OT canon is scripture. That which is not included in what our Lord stated should not necessarily be considered "scripture." Perhaps that which was not stated by our Lord as scripture may very well be good and interesting reading (like our own history books) and have a measure of value; however, it is not inspired. Also, if you look at the history of the various books of the NT and see the "circa" or about the time of the writings in the NT, you will not that the early Christians were indeed Christians without the aid of the NT. From the time of Pentecost when the holy spirit was poured out until the writing of the first book or letter in the NT, Christians functioned quite well without the new testament canon even being in place, yes? Just something to think about.
Inkie