“No, the offices of episcopoi, presbuteroi and deaconoi were established prior to the completion of the New Testament and are not derived from it.”
Sorry, but the NT and OT have no beginning or ending date as they are eternal as our God.
John 1:1 New International Version (NIV)
The Word Became Flesh
1 In the beginning was the Word, and the Word was with God, and the Word was God.
The Apostles were led by the Holy Spirit, so the the Scripture was indeed in their heart because our God was there.
The Church was established by God through Jesus Christ again the “Word” was already there. Oh it may have been wrote down on paper later on, but God led them with the word anyways.
Sola Scripture
Galatians 1:8 New International Version (NIV)
8 But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let them be under God’s curse!
The Scriptures are the word of God, not the WORD and are not eternal. They are not God. They were written by men in time inspired by God. Your idea of an eternal book coexistent with God is Islamic not Christian.
But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let them be under God’s curse!
The gospel other than the one he preached, not wrote. The ministerial offices were established as a result of the preaching of the apostles prior to the writing of the New Testament.
Does your Bible have an Introduction for each chapter?
Usually the introduction has a date when it was possibly written>