[smbrouss70]

1. You can buy a kit at your local auto parts store to rebuild your calipers. Most people just get another set of calipers since it isn't much more money.

2. The bushings are still in your calipers, see the silver sleeves in the cast iron caliper ears? They are designed to let you tighten the bolts completely, but let the caliper "float" in and out as the pads wear down.

3. The clip with the rivet is there to cause noise when the pads get thin enough for it to contact the rotor surface. It's a warning of sorts to tell you that the brake pads are getting dangerously thin.

The pads are interchangeable left & right, but there is an inner and outer. Usually the inner has a clip on the metal side of the pad to hold it up to the piston of the caliper. If all 4 of your pads are as thick as the one in the picture, they still have plenty of life left in them.