This question makes little sense.
The oldest religion of Japan is animism. Then came Shinto.
Christianity is the oldest religion in Europe.
The "oldest" existing religion on earth is Hinduism (c. 2900 BCE) but it was undoubtedly not the first religion, which would have existed before invention of the written word or pre-history.
Hinduism is the Oldest, and Zoroastrianism is the third oldest.
Jainism is not the oldest religion of the world. Animism and Hinduism have been cited as the oldest religions of the world.
No. There was most likely religion before there was any form of writing, which make it impossible to know what the oldest religion was or is.
Catholics do not claim to be the oldest religion as there are a number of older religions, Judaism for example. However, Catholics do claim rightly to be the original and oldest Christian religion.
Hinduism is the oldest religion on earth and is also called 'Sanatan Dharma or the Eternal Law. The origin of the religion can not be traced and thus it can not be accredited to any one person.
The oldest monotheistic religion is Judaism.
That depend on your religion. Some religions believe that people were. But if you go for evolution, then its single celled organisms.
Hinduism is the oldest religion in the world.