1stly don't get a credit card for the sake of it. You need to check a couple of things 1st
1. What is the interest rate, this is really important, don't get a high rate card it is a waste and not a good way to spend your income.
2. Check the terms and agreements, some cards are out to get you and will even raise your rates for arbitrary reasons. Go online and check the reputability of the company.
3. is there an annual fee, is there a membership fee, is there a one time fee, if you are not careful you may end up owing money before you even use it.
4.what are the default rates if you were ever late once by mistake. most reputable companies will let you slide if you have a good payment history, sometimes life keeps you busy, or you may have thought you paid it when you didn't. A non-reputable company may have a clause that they will raise your APR to a ridiculous amount like 30% or something.
5. never ever use your credit card to obtain cash... unless it is a dire dire dire emergency.. the interest rates for cash are not the same as cc purchases.
6. And finally, charging a little and keeping a small balance is quite healthy for your credit, as it shows other creditors that you are responsible and make timely payments.
if you decide not to get a credit card... I am not sure about India, but here in the US, you can buy pre-paid credit cards. you pay cash for them up front and then you can use them anywhere as a credit card.