Its just another credit card. You will have to pay at least the minimum on your monthly credit card bill. As Ricochet told, the 0% interest for 6 moth is applicable if you buy in that way, ie you have to mention it to the sales person.

One of my friends was so happy that his credit card's interest was 3.6%...The bank didn't mention explicitly that it's per month, that is around 40% per year.

Banks don't usually give time to the customer to read the fine print so that they can make money from ignorant customers...