You only need the bolts that are holding on your bumper. There should be 4. Depending on the model, you might need an extra couple small bolts, but there are no brackets or anything that you need. Its a 10 minute job to install.
That being said, shoot some PB Blaster onto the threads of the bumper bolts. They are hidden in the chassis raid behind the bumper, but you can see it (and easily shoot them) from underneath.
Lastly, loosen both bolts before removing either. They thread into plate which is held in place by a weak spring clip. If you take one bolt out, and then crank like hell on the other, you can break this clip or bend it out of shape.