Opinions on which is the "true religion" will vary: believers of many different religions will tell you that THEIRS is the true religion.
Several religions believe in a single God; usually this single God is all-powerful, so that would reply the second part of your question. The key word to search for (for example, in Wikipedia, or in Google) is "monotheism" (belief in a single God). Some religions that believe in a single supreme God are Christianity, Islam, Judaism, Bahá'í Faith.
No, There is no religion who believes God is time.
Christianity believes in One God, Who Is Father, Son, and Holy Spirit.
Roman State religion was idolatrous and Christianity believes in the one true God.
he believes in god and he believes that god is the one and only god
Yes, every religion for heavenly father is true.
He believes in god
It is a polytheistic religion. If a religion believes in one God, they are monotheistic. (Christianity, Islam, Judaism are monotheistic)
There may be more than one, but Christianity believes that God is an infinite being.
no, he is someone who believes in god but has no religion
any religion that believes in one god is monotheistic
It depends on what your religion believes in. If your religion believes the will of God is for you to wear ear rings, then it is best you follow do so, in my opinion. If it isn't, then I wouldn't.
Theistic - believes in a God or gods Agnostic - does not believe it possible to know if there is a god (or gods) Atheistic - believes there is no god or gods.