Chock back wheels the jack up from end. Take off one wheel at a time. Take bolt out of brake caliper and slide down from disk. open brake fluid recepticle near upper back of motor. Use large C-clamp and old pad to depress caliper cyclinder. put new pads on caliper with clips that come with pads. replace caliper onto disk and replace bolt. do the same on both sides. replace wheels the check to make sure that you have enough fluid in resovior. You can get a book from the auto parts also for further help.
Do NOT just use a C-clamp to depress the old caliper unless you want to have your master cylinder go out! There's a (check) valve in there that you can blow out... when you go to depress the caliper, slightly open the bleeder while doing so, this way the fluid being depressed out of the caliper escapes through the bleeder, and doesn't blow out the seal in the master cylinder (note, this damage many not be immediately apparent! - you'll find out the hard way later on when you really need the brakes)!