I'm not sure you have the tools to repair those dents. The fender should just be replaced, you can easily find a cheap replacement on Craigslist or eBay. The dents on the rear will have to be pulled out with a puller. You basically drill holes in the body, insert stud and use a slide hammer to pull them out until the area is almost perfect. (You lay a straight edge across the dent.)
When the dent is 1/4" or less from the straight edge sand off all the paint on the area, then you can apply Bondo or other body filler to smooth it out. It will probably take a few coats to get it right.
Then primer over the area and paint it.