J.C. told St. Peter, something like this (read more carefully the Bible to see in His own words the dialog): "You are a stone and over you I'll build my church".
St. Perter was the first Pope and the actual Pope is a suscessor of St. Peter.
The Pope is not a God and catholic people don't see him like a God.
You have the information twisted and/or wrong, that's why you can't figure out what's going with the catholic church.
If you was in the Vatican, there, someone could have help you with your doubts.
By the way, the limbo is a place that teologist use to explain where the souls go when people dies without baptism, the Bible says that no one will go to heaven (with other words, off course) without baptism, but theologist don't wanted to call that place inferno, so the limbo is used to explain where the inocent souls that are not baptised go.
And yes, the vatican is rich, no church can operate with efectivenes with out resources, or do you think musulm, budist or other christians churches are starbing without a penny?, the rich of the vatican is because of his too many years serving and because all the people that donates parts of his incomes in favor of the church and yes so the church can exercise its ministery, and yes, there's corruption, but not all the church is corrupt, the church is administrated by men (and you know we're not perfect) and like everywhere in every religion, there are good people and bad people.
I wonder if you have a religion, if you do, what would you think about your religion, is clean and perfect?
Excuse my english, I'm not very good speaking it or writing it.