Yes, Voodoo or Voudun is essentially polytheistic, or multiple deities involved.
No, the ancient Egyptians did not have to worship their gods and goddesses, it was a part of their faith and belief that they chose to.
Hinduism
The worship of many gods and goddesses is polytheism.
The pray with sacrifes of shrines.
No, they worshiped their own gods/goddesses.
Temples dedicated to specific gods or goddesses.
Hinduism is a religion where they believe in many gods and goddesses.
A lot. The Greeks worship many gods and goddesses so you can't find the exact number. There are many major and minor Greek gods and goddesses. You have to be more specific, how many Greek major gods or how many minor gods.
osiris,bast,hathor,etc
No. Any god they could worship would be considered their equal.
Yes. The Greek gods and goddesses are still worshipped today.
No, temples and shrines were places of worship, not homes of Egyptian gods and goddesses.