Where is the gift of the Holy Ghost, repentance and water baptism for the remission of sins--the taking of the gospel to the Gentiles--as a whole, etc--found in the OT?
Mag--the same principle applies. The NT apostles revealed a number of doctrines which can't be specifically found in the OT. And the traditional Jews were bringing the same argument, in principle--against the NT apostles, IE--they were teaching things which could not be found in the Biblical text they had. They were asking the same type of questions you are asking.
That's the power, and nature of God's church--to reveal things which eye had not seen, nor ear heard:
1 Corinthians 2:9---King James Version
9 But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.
That was Paul's answer to those who brought up questions such as yours, in principle.
So--
1 Corinthians 11:11---King James Version
11 Nevertheless neither is the man without the woman, neither the woman without the man, in the Lord.