Tire scraping against car?

I hear a noise backing out my car out of a parking spot, then again when I pulled forward. So I load some stuff in the car, pull it back into a spot and I get out and I can smell burned rubber. I look at the car can't see anything, so I go back into work. Well when I leave for the day I am driving down the access road and can see smoke in my rearview mirror, it was coming from my tire, apparently the tire is now scraping against the wheel-well So I am wondering what is wrong with my car. I have heard it could be bearings, a tie rod, or the suspension. Anyone with any car knowledge can you give me an opinion on what it might be and what it might cost to fix it?!?!?!