catholics believes that humans have free will and are in control of their own actions, and can control their own fate by making choices.
protestants believe in predestination, which means God has already predetermined who's going to hell and heaven before a person is born, which means a person have no control or choice over his life and fate.
Is it true Catholics and Protestants have been killing each other by the millions for centuries because of minuscule religious beliefs such as "When communion is taken, was the bread and wine meant to be literal or metaphorical". The Answer: Yes.
Catholics believe the basic Christian things, like Jesus was God's son and he was God. He came to save us from our sins. God and Jesus and the Holy Spirit: Catholics in the same God, Son, and the Holy Spirit that other Christian churches do. The next three beliefs are found only in Catholic church, not Protestant: Catholics pray to God, but they also request that Saints pray for them too. Sometimes people see the way the revere saints and think Catholics actually worship the saints. That's not true. But, they believe that Saints are in the presence of God and pray for people on earth. Jesus' mom gets a place of reverence and devotion. She's just a little lower than Jesus and just a little higher than the saints. Immaculate conception: It's the belief that Jesus' mother was sinless at her conception, because Jesus couldn't be born from a sinful women.
Both statements are false. The first about Catholic theology is true in the sense we believe in free will but not without God's grace which draws us to Him by appealing to our Prue-prepared souls circumcised by His law. Without the law written on our hearts we could not recognize the call of the spirit to surrender to that law.
The second is true for Calvinist Protestants only. Not all Protestants follow the heretical teaching of John Calvin. However, you have a good understanding of Calvinist teaching.