They believe in dualistic gods. Ahura Mazda (the good god) and his counterpart Angra Mainyu (the evil god). Ancient Persians believed in this religion.
It's an old Persian religion in the times of the Parthisian, Achaemenid and Sassanian empires. The Arabs attacked Persia in around 550 ac and converted everyone into Muslims and now the people who are Zoroastrians are the people who survived the Arab massacre.
Unless you are more specific, no one can help you.
Zoroastrianism originated in Persia. They worship Fire God called Ahur Majda. When Zoroastrians die, they leave their bodies to be devoured by vultures as they believe that every part of ones action should benefit others.
The Persians believed in Zoroastrianism which reflected and demonstrated the gentler hands of Persian rule. The Persian Empire was gigantic in geographic terms for ancient times, and went unchallenged until Alexander LL, where it eventually dissolved. The legacy of the empire is great and it created a major religion (Zoroastrianism) that was only first to modern day Christianity and Islam a long with Judaism and Buddhism.
Zoroastrianism was created by Zarathushtra and it was one of the world's first monotheistic faiths. (belief in one god). Zarathustra taught that humans are free to choose between right and wrong, truth and lie, and light and dark, and that their acts, words, and thoughts would affect their lives after death. He was thus the first to promote a belief in two heavenly judgments: of the individual soul right after death and of all humankind after a general resurrection. His ideas of heaven, hell, and the resurrection of the body profoundly influenced Judaism, Christianity, and Islam. Later Zoroastrianism conceived of an opposition between body and soul, though there was no suggestion in its theology that the body was evil and the soul was good.
If you want more info than this you can go here:
http://www.beliefnet.com/Faiths/Zoroastrianism/index.aspx
A virgin will give birth to a savior, great destruction and then he will destroy evil forever. Where have we heart that one before?
Zoroaster lived in Persia about 1500 Be and like all the starters of a new name for the gods of Babylon, he started a new movement in name only. It was the same old, same old. the Zoroastrians fled to India and that is where the modern largest group of Zoroastrians still reside.
Zoroaster was influenced by the myth of Tammuz of Babylon, and so were all other mystery savior religions with similar story plots. As people left the cradle of civilization, they brought their stubborn mythological beliefs with them, and every time a mythology religion begins to die, someone comes along to revive it by renaming the gods and giving the story a slightly different plot.