I was unsure where to post this, because the list is really differences of what are required beliefs that include sacraments, I put it here.
Marty Rothwell, an author on a Roman Catholic site “Christ’s Faithful People,” suggests that prior to the Protestant Reformation in the early 16th century, all Christians were expected to believe in many key doctrines.
Some of these are still shared by most Protestants:
1)"God the Son is of the same substance and nature as God the Father."
3)Jesus is fully God and fully human.
However, there are also beliefs not shared by most Protestants, or not shared to the same extent:
The Body and Blood of Christ are present in the Eucharist.
The Apostolic Succession.
Beliefs are grounded in both the Bible and church tradition.
The Holy Spirit guides the Church away from error.
The effects of baptism.
Believers are saved by Grace and faith.
Salvation can achieved and later lost.
Baptism of infants.
The Deuterocanonical books / Apocrypha form an integral part of the Bible.
Clergy are restricted to males.
The Pope is the head of the Christian church.
Canonization and veneration of saints.
Effectiveness of the prayers of deceased saints.
Confession of sins to a priest.
Penance is needed after sinning.
Purgatory as the destination of many persons after death.
Prayers for the dead are effective.
Seven sacraments of: Baptism, Confirmation, Confession, Communion, Marriage, Holy Orders, and Extreme Unction.
Veneration of the Virgin Mary.
Images are useful aids to worship.
I got this from religious tolerance.