Uhh, timing belt on a 2000 is only due after 90K. I let my '99 go 120K. Unless you have a coolant leak or WP problem, I don't see why you need to do this now. I would do all fluids, including coolant, brake and power steering, plus plugs, wires, and air, oil and fuel filters. Then I'd check steering, suspension, pads and shoes, adjust rear brakes and e-brake and call it good.
The only wear parts I changed prior to 64K were the tires--hated those GD Goodyear Wranglers. If it's a slushbox, search strawberry milkshake and bypass the stock tranny cooler--this is urgent.