Are the rosary, crosses, statues of saints, crucified christ images counted as idolatry
No, because they aren’t worshipped as gods or believed to have any inherent power or divine attribute. A rosary is just a string of beads to count prayers, it can be blessed but that doesn’t count as worship. Statues of saints are just statues and are not in any way thought of as divine in Catholic tradition- you can easily live your whole life as a devout Catholic without owning a single statue. Some people like to own them and light candles and pray before them but that’s only for the sake of being better focused in prayer, tradition, etc… The key word here is
before, not
to- people pray before a statue, not to it.
For crosses and crucified Jesus images: Again, people aren’t praying to the cross or to the image, they’re praying to the God represented on the cross or in the image. The distinction is quite easy to make. If I’m praying in front of a crucifix and you remove it, I wouldn’t stop praying and look cross because the subject of my prayers is Jesus, not His image.
Is it idolatry to pray to Mary and Saints?
As per Catholic theology, no. Catholicism recognizes three levels of prayer:
dulia, or veneration, which is offered to saints,
hyperdulia, or high veneration, which is offered to Mary because of her special, unique role as Mother of God, and finally
latria, which is actual worship, offered to God alone. Protestant theology doesn’t make such distinctions between prayer ‘types’ and therefore it is easy for Protestants to not be able to differentiate between them or mentally separate them. Catholics understand that praying to a saint is not the same as praying to God. We pray to saints with the expectation of intercession, meaning we don’t believe saints have any special power except that which God sees fit to give them (only God has power, as goes the Lord’s Prayer-“Thine is the power”).
Hope this helps.
Christ’s peace.