Weight and skin problems!!!?

So before I got pregnant back in 2009 I had a couple stretch marks on my sides, a bit of a tummy, black heads that were big on my nose mostly, and I weighed 130lbs. (Thats a bit more than I should) I am 5'2" as well. Now I have a bunch more stretch marks, Im fatter (145 lbs!) and those black heads r still there!!! I need help on getting rid of this baby fat, stretch marks, and shrinking the size of these black heads. If ur wondering why I dont excersize, Im a mom cooped up in a house in the coldest part of winter with only the money to buy things like taco fixings, or microwave dinners. :( Can anyone help me?