I think i don't have a graphic card. So is it not possible to mine any coin without graphic card. And GPU = graphic card ??
Indeed GPU = graphic card. If you don't think you have one, it's probably an onboard GPU, which is almost useless for altcoin mining.
It's possible to mine tough, you can search this forum for CPU minable coins... There are plenty of threads where users ask which coins they can mine with their CPU
I personally mined magicoin for a while. It was decent, but i still made less than the power cost and the damage to my PC.