What are the most inexpensive and best beauty products of this century?

I really need help! School is coming back in 3 weeks and I want my skin to be peachy clean without any flaws. I have oily skin even after I scrub my face clean. I want to keep my softness so I was wondering what I can use that is cheap but works like you just came out of the saloon! And a have a scab that whenever i try to get rid of it white blood comes out! I know its disgusting but I was wondering how I can get it off! One more I really want a heat protection for my hair that works but won't put a hole in my pocket. Thank You