You can’t buy Ethereum directly using rupee. But you can buy ether from Bitcoin.
You need first to buy Bitcoins using Unocoin or Zebpay or Coinmama or Changelly or LocalBitcoins. I will recommend Zebay and Unocoin only. Then, you have to transfer your bitcoins to Poloniex or Kraken or Bitstamp. After that, you can convert your Bitcoins into Ether. Just comment if you have any problem.