If you want to invest in stocks come to ICICI Direct. Its probably the best place to enter in investment world. You can invest in Shares, Debentures Bonds Corporate Deposits, Futures Options Invest in insurances MF Currency postal deposits etc ask for any thing and you get it here except commodities.
Best is you can keep a track of all your transactions which will help you a lot at the time of filing returns. You get inbuilt portfolios. Learn about Derivatives and get expert opinions. You can get different brokerage plans also to choose from as per your requirement and best when you buy shares your bank get debited automatically and on selling your account is credited without any pain of collecting cheques checking transactions issuing checks . Its really wonderful.