There are Scientologists in every country in the world. Obviously, no one country "practices" Scientology, i.e., it is not the official religion for any country.
Zeus is a mythological figure from the Greek Religion. Scientology does not contain any teaching about Zeus. A person who practice Scientology is free to chose his own personal beliefs, and Scientology does not interfere with one's personal faith. A person can believe in Zeus and still practice Scientology.
yes
it is called scientology
Tom Cruise's religion is Scientology which is also practices.
Scientology is in a small minority in all countries where it is found. There are no reliable statistics, but the country with the largest number of Scientologists would be the United States.
Scientology is not a faith based religion. It is an applied religious philosophy. It offers tools that one can use in his own life. One is not asked to worship a God or Gods in Scientology. What God is, is up to each personal understanding. People from all faiths practice Scientology. You can be a Christian Scientologist or a Muslim Scientologist, it doesn't matter.
No, Jack Black is not a Scientologist. He has publicly stated that he does not practice Scientology and has expressed skepticism about the organization. Black is known for his roles in comedy and film, and his personal beliefs do not align with those of Scientology.
No, Dakota Johnson is not a Scientologist. She has publicly stated that she does not practice Scientology and has distanced herself from the organization. Johnson's family background includes connections to Hollywood, but her beliefs do not align with those of Scientology.
Scientology has often been accused of using dirty tricks to attract people, and to keep them. It has in fact been outlawed in some countries. To learn more about Scientology, I suggest you start with the Wikipedia article, http://en.wikipedia.org/wiki/Scientology. There is also a more specific article on controversies here: http://en.wikipedia.org/wiki/Scientology_controversies
No, Scott Bakula is not a Scientologist. He has publicly stated that he does not practice Scientology and has not been affiliated with the Church of Scientology. Bakula is known for his roles in popular television series like "Quantum Leap" and "Star Trek: Enterprise."
Scientology is Fake.
You have to take a class for Scientology.