Well, if you are SURE it's the caliper, it's pretty easy. First, unbolt the line from the back of the caliper. Make sure not to lose this bolt, it's called a banjo bolt(has a hole through the center) and is expensive. You'll also notice a couple copper crush washers here, make sure to get a couple before you start this project. You CAN NOT reuse these. Also, try to plug the line somehow, or at least attach it to something high so it doesn't drip out fluid. Then there is a pin that prevents the caliper from rotating in the bracket. Remove the clip off the back of it(keep the clip), and pull the pin out. The caliper should slide off of the rotor. Remove pads and you're good to go. Install in the reverse order, making sure to put your new copper crush washers in.
Bleeding the brakes is pretty easy. If you do the LF caliper, you probably won't need to do all four corners, just the two fronts. If you do the two fronts and your pedal is still soft, then do all four, start at the RR, then LR, then RF, the LF. Basically starting at the farthest from the master cylinder and getting closer. You'll see on the back of the caliper that there is a little(pretty dang small) nipple/zirk thing with a rubber cap on it. Take the rubber cap off. This is where you'll need a buddy. Have someone pump the brakes and hold the pedal down, and then you will unscrew that zirk just enough that the brake fluid can shoot out. Only do it long enough for the flow to slow down, and then tighten back quickly(just do maybe a half turn opened and closed). Have your buddy pump and hold again... and again... until there are no air bubbles or in the stream of brake fluid. Also, make sure not to run your master cylinder out of fluid. That's bad. That's about all I can think of.
