Uh... no they're not. Purgatory is nowhere in the Scriptures.
Priests are not covered... Elders are, and even Deacons in Timothy and Titus. No priests.
And NOWHERE in Scripture does ANYTHING appear about the heresy of the papacy. No. Where. Ever.
As for the teaching they did? Oddly (and easily enough) it can be found in the Scripture they wrote under the inspiration of Almighty God.
They knew a lot and taught a lot; but they did not teach Mariolatry, Purgatory, or the papacy. Those are doctrines of man, made of whole cloth, and foisted on Roman Catholics to the dangers of their eternal souls.
Hoss
Radio Replies First Volume - Indulgences
Indulgences - and Why they Remain Vital to us Today [Catholic Caucus]
Pope OKs plenary indulgence for Lourdes' 150th anniversary [Catholic/Orthodox Caucus]
[What Every Catholic Needs to Know about] Gaining Indulgences [Catholic/Orthodox Caucus]
A Brief Catechism for Adults - Lesson 26: Indulgences
Vatican says Catholics can get indulgence for sick-day activities (Devotional Announcement)[World Day of the Sick]
ortiuncula Indulgence can be obtained this Sunday
He who holds the keys to the kingdom - the Catholic practice of granting indulgences
POPE GRANTS PLENARY INDULGENCE FOR YEAR OF THE EUCHARIST
New Plenary Indulgence to Mark Year of the Eucharist
Infallible Infallibility
Docility (on Catholic dogma and infallibility)
Beginning Catholic: Infallibility: Keeping the Faith [Ecumenical]
Papal Infallibility [Ecumenical]
Peter & Succession (Understanding the Church Today)
Pope: may all recognize true meaning of Peter’s primacy
THE PRIMACY OF THE SUCCESSOR OF PETER IN THE MYSTERY OF THE CHURCH
Pope St. Leo the Great and the Petrine Primacy
The Epiphany of the Roman Primacy
THE PRIMACY OF THE SUCCESSOR OF PETER IN THE MYSTERY OF THE CHURCH [Ratzinger]
Program 14: Peter’s Authority at the Council of Jerusalem
Program 16: Papal Authority and Paul’s Rebuke of Peter
Program 22: Papal Infallibility
Program 23: Peter is the Rock of the Church
Program 25: Peter Alone Has the Keys to the Kingdom
Program 38: Core’s Rebellion and Church Authority
Program 39: The Church is the Judge of Scripture
Program 18: Purgatory in 1Cor 3:15
Program 19: Purgatory in Matthew 5
Program 49: There is a Purgatory