You should have posted this topic in India forums. Anyways the best way to buy the bitcoin in India is zebpay, unocoin, Localbitcoins, coinsecure, coinome. First open a account in all the above mentioned exchanges and link your bank account to the website account.Visit this site for upto date rates in exchanges :
http://www.bitcoinrates.in . Check the exchange rate and the one which is highlighted in green in buy section you need to buy bitcoin as they give you max volume in BTC. If you want to buy BTC for Fiat currency check the traders in Localbitcoins.
The minimum amount which these exchanges offer to buy is 1000INR. There were days when the minimum amount for buying was 500INR. But since these days BTC prices rose everything rose. Happy Buying
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Please if you are posting next topic post it in appropriate section.
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