Well, you mention 3 things, Jackson. Let me take just one for now. Even before the New Testament, the Old Testament Maccabees prayed for the departed, which is based on purgatory:
"Thus he made atonement for the dead that they might be absolved from their sin." (2 Macc 12:46) Even the Jews believe in purgatory, as you can read in the Jewish enyclopedia here:
https://www.jewishencyclopedia.com/articles/12446-purgatory
In the New Testament, St. Paul the Apostle says in
1 Cor 3:13-15 that some receive a reward for good works done in faith, while other Christians are saved only through fire:
"13 their work will be shown for what it is, because the Day will bring it to light. It will be revealed with fire, and the fire will test the quality of each person’s work. 14 If what has been built survives, the builder will receive a reward. 15 If it is burned up, the builder will suffer loss but yet will be saved—even though only as one escaping through the flames." That has traditionally been understood as a reference to Purgatory.
This site (
https://www.scripturecatholic.com/purgatory/#I_The_Early_Churchs_Belief_in_Purgatory) mentions the Early Church's Belief in Purgatory with documentary evidence:
"Tradition / Church Fathers
I. The Early Church’s Belief in Purgatory
“And after the exhibition, Tryphaena again receives her. For her daughter Falconilla had died, and said to her in a dream: Mother, thou shaft have this stranger Thecla in my place, in order that she may pray concerning me, and that I may be transferred to the place of the just.” Acts of Paul and Thecla (A.D. 160).
God Bless.