"Paul was, simply saying here ... that he preferred not to evangelize in an area where the people already had been evangelized by another of the Apostles."
Right - Peter!
I note that Paul didn't mention Peter in this passage. His statement was much more broad.
"Where are there priests mentioned in the Biblical New Testament Church (other than the priesthood of all believers) ? "
Just about everywhere you see "elders." The Greek word is "presbuteros" from which we get "priests".
In that case ... most churches do have all of the offices you mentioned (i.e. bishop/pastor, priest/elder, and deacons).
"Where is the Mass described ?"
In the gospels, in 1 Corinthians, in Revelation, etc.
Could you be a bit more specific ?
"Where is marriage taught as a sacrament ... or confirmation ?"
Marriage? Genenis prefigures it. The OT praised it repeatedly. Jesus clearly showed His blessing toward it. The fact that there is no explicit verse saying "It is a sacrament," doesn't change that fact. Confirmation? See (James 5:15). "Then they laid hands on them, and they received the Holy Spirit." Or "Therefore I remind you to stir up the gift of God which is in you through the laying on of my hands." (2 Timothy 1:6). " And "Then they laid hands on them, and they received the Holy Spirit." (Acts 8:17).
So confirmation is the laying on of hands ... to receive the Holy Spirit ?
"Where does the scriptures say that christians will teach angels ?"
I already listed that verse. Here, I'll list it again for you: Ephesians 3:10.Ephesains 3:10 To the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God,Could you help me out here ?
I'm afraid I don't see it.
You wrote:
”I note that Paul didn't mention Peter in this passage. His statement was much more broad.”
No, he just didn’t mention Peter by name. And why would he if Peter was a hunted man living in Rome itself?
”In that case ... most churches do have all of the offices you mentioned (i.e. bishop/pastor, priest/elder, and deacons).”
Nope. Protestant sects have offices created by men, not by Christ or the Church. You could start calling yourself a bishop tomorrow if you wanted to. Who would stop you? Would that make you a bishop, however? No. The Church makes bishops after Christ sent the Apostles.
”Could you be a bit more specific ?”
The Mass is described in Matthew, Mark and Luke in the Eucharistic narratives. It is seen in prophecy in John 6. It is described in 1 Cor. 11. It is described in Rev. as the worship in heaven.
”So confirmation is the laying on of hands ... to receive the Holy Spirit ?”
Yep.
”I'm afraid I don't see it.”
Then you must have a serious problem. You know that principalities and powers in HEAVENLY PLACES means angels right? And who or what makes known to them that manifold wisdom of God? The verse says the Church does. The Church teaches even angels.