No. Brake rotors are sold individually specific to your make and model, but it is recommended that you always replace both sides at the same time.
Rotors may be warped
remove the brake caliper and the rotors come right off
You can purchase one or more.
No. Brake rotors don't have bearings, the wheel hub does.
Tap on the rotors with a hammer, after removing the tire and wheel and the brake assembly. The rotors will come loose. Slide the rotors off and reverse the process.
You can buy just one.
You will need to remove the front tire and wheels from your 2002 Jeep liberty. Remove the brake pads and break assembly. Tap the rotors with a hammer or mallet. The rotors will come off. Reverse the process to install the new rotors.
You have not set and adjusted them correctly.
Sounds like you need a new set of brake pads and might have to get the rotors turned. Sounds like you need a new set of brake pads and might have to get the rotors turned.
Brake rotor removal varies on different vehicle. You must first remove the caliper. Some brake rotors simply come off after this. Some rotors are fastened to the hub by screws. Some rotors are bolted to the hub, and the wheel bearings must be removed.
Brake calipers are the hydraulic devices that wrap around the rotors and pinch the brake pads into the rotors when you stop.
You can get your brake rotors replaced by visiting Autoparts Warehouse which contain various brake rotors in size and durability to fit your needs and accommodate your budget.