7mm hex socket for the front caliper and 10 mm hex for the bracket bolts. For the rear if you have disc it's 19mm for the caliper
a brake caliper tool (really)
18mm
3/8 inch Allen wrench
7mm Allen wrench
this is a special design guide (not a regular bolt)
I believe a 3/8 Allen is the right tool.
you can get the tool that removes the rear calipers from any autozone or advance auto parts. they rent it to you and you leave a deposit. the tool is designed to turn the caliper as it is being pushed in. if this tool is not used the caliper will fail.
Hose?
there is no special tool to remove them but one is needed to compress them to get them back on for the rear.
By measuring it using a suitable tool such as a ruler or caliper
To replace the brake pads on a 2000 Saturn L Series, you will typically need a few essential tools, including a lug wrench to remove the wheel, a C-clamp or brake caliper tool to compress the caliper piston, and a socket set to detach the caliper from the bracket. Additionally, having a torque wrench is useful for reassembling the components to the manufacturer’s specifications. Safety glasses and gloves are also recommended for protection during the job.
You would need a T40 Torx Bit to remover the caliper pins.