Of course he taught it, for the Scripture texts i supplied clearly shows this. The souls he told to "turn from these vanities unto the living God," and to repent and turn to God: (Acts 14:15; 17:30; 26:20) were not saved but lost.
This cannot be denied, and thus Paul did indeed preach repentance as a condition for salvation, and posting other texts does not refute this, and are not contrary to it.
For as too often explained, faith appropriates justification, versus works earning it, but faith itself signifies repentance, and thus by calling souls to repentance, to "turn from these vanities unto the living God" and that God "now commandeth all men every where to repent" then Paul is telling them to believe on the Lord Jesus, versus idols and what that basically signifies, not that works or a reformed life saves them. And calling them to be baptized is a call to call upon Christ in faith, confessing the Lord Jesus. More substantial than "say this prayer" though that is the norm today.
Same as some who use an altar call. I am reminded of the Billy Graham crusades and as people come streaming forward to proclaim Christ. Same as in Acts 2.