You have to open a bank account first.. Than you have to go to the brokage house, for the account opening... right now comission slab for KASB is very low, soon i will be trading with them.. There are many others as well.. like BMA, invest cap.....
When the account will be opened.. They will give you an online termianl from where you can trade.. Account can be opening vary from brokage house to other.. Some open even at 10k, some open at 25k and some open at 300k...
One thing if you want to come into this business..make your self a risk taker and have strength to hold the stress on mind... If you have bought almost 1 lac share of any company and just 0.50 rs par share down.. This means u totally have a loss of 50,000 Rs.... In one day you can earn millions and on the same day you can have a loss of billions.
If you entering for the sake of fun...than first learn it by studying the market trends.. how the share moves upwrard... when there is a buy call and when there should be a sell call...spare your time and than move in.. or you can read the researches done by the different brokages house.. investorguide360.com you can visit here... pakinvestorguide is a good forum you can learn many things from there as well...
First try to learn the market trends than get in the market.. Many people came in this.. made money and go... and few people bear too much losses that in the end they were with the hear attacks.. or depression...
But the business is where you get profit and loss as well...Best of luck if you also want to be in the pool..