The Vatican houses the head of the Roman Catholic Church and all of his advisors so I would venture to say that it is a primarily Catholic community.
No
There is only one religion practiced in Vatican City, home to the Pope, and that is Catholicism.
No. The only religion in the Vatican is (Roman) Catholic-Christianity. However, there are many people of different religions or none at all that visit the Vatican for history-learning purposes only and there may be (on occasion) a leader of a different religion might meet with the pope; though its quite rare as the current Pope only meets with Catholics and other Christians not part of the Catholic Church. The Vatican has an official religion and that is Catholicism within Christianity. In a way (in some respect) the Vatican is the official "headquarters" of Catholicism and not any other religion.
Absolutely. Being the home of The Pope and the Vatican, you'd expect it. The major religions in Italy are Christianity (Catholicism), which over 80% of the population follow.
Vatican. The Eastern part of Al-Quds (or East of Jerusalem) in the Palestine territories is important for the three Abraham religions; Judaism. Christianity and Islam.
There is no Vatican Island. However, the Vatican is an 'island' in the middle of the city of Rome.
The state religion of Vatican City is Roman Catholicism, and it is governed by the Catholic Church, so you have to be Catholic to do most government and bureaucratic work. However, there are many other jobs in Vatican City which do not require applicants to be any particular religion. Also, anyone with a valid passport is allowed to visit, regardless of religion. There are no places of worship that aren't Catholic, but that's probably because there's no space for them.
Yes, in Vatican State. However, all religions except Catholicism are prohibited from practicing there. The only churches are Catholic. Non-Catholics are welcome to visit, however.
Vatican Council I was the first Ecumenical Council to be held at the Vatican in Vatican City which is an independent country.
Vatican City is the capital of Vatican City the country.
There are no hotels for tourists in Vatican City. Visitors to the Vatican usually stay in hotels in Rome which surrounds the Vatican.
No, the Vatican is in Italy, Europe.