No one believes in Hinduism Now. Hinduism is Dead.
Many emperors of India during middle ages spread Hinduism Extensively. Mainly now there are organisations which spread Hinduism. But no one is forced to embrace Hinduism.
Hinduism originated in the Indus Valley near the Indus River in modern day Pakistan. But Hinduism migrated across to India (as you may know Pakistan was one part of India). There is no exact date that tells us when it originated as it is the oldest religion on the planet. Hinduism's real name is Santana Dharma
Teachings of Lord Brahma or brahman is the base of Hinduism. Lord brahma taught first man Philosophy of life and way of living, it is now known as Hinduism.
as if now there are more than a billion followers of Hinduism. most of them live in India, nepal and Myanmar.
The main religion practiced by the people in India is Hinduism.
today Hinduism teaches the world how to live with Religious tolerance and how to maintain peace. Also now a days Hinduism teaches people unity in diversity.
No, Buddhism is rejected from Hinduism right now.
The caste system used to go by what career you aspired, but now it changed to be a bit racist. Hinduism does not justify the caste system, and caste system is now illegal in india. It is more of a social/cultural thing than a religious custom.
Buddhism, but I wouldn't say that they are rivals, but complements.
Hinduism and buddism
Hinduism