Sir I live in india and I won 10,000 $ in a online casino, I have not yet cashed that money to my account am I liable to pay any taxes on the money and is my money legal??

If this is a U.S. tax question, you owe NO U.S. taxes, because no on-line casino is based in the United States.

As for the legality, that depends on Indian law, on which I am NOT an expert.

I cannot comment as to whether you owe taxes to the Indian government. Try posting your question on http://www.mytaxes.in.