What is the best skin care product for me?

I’m 33 years old. I have zits, blackheads, scars and oily skin. I think my skin may also be sensitive because some products have made it worse. I’ve even tried the expensive stuff like Pro-active. I need something I can buy at Walmart that will get rid of all this mess on my face, something that works and doesn’t cost out the yingyang! help!