Replacing my rear brake pads & discs

The best way would be to remove the wheel and see if you have drums or discs. Disc brakes on the rear will look like the front brakes, as discs are required on the front of 1970 vehicles and newer. You will see the rotor which will be shiny where the pads have rubbed it. On a drum, it will look like a rusty metal bowl facing away from you. If you have custom wheels you may be able to see through the spokes, but dust guards will not let you tell from the back.

Yes, it has rear Disc Brakes, I would suggest to change the rear pads since they have to remove the rear Brake Calipers to remove the rotors and it wouldn't take much more time or labor to replace the pads at that point. That way when your rear rotors are re-installed and your new brake pads are installed your rear brakes should give you longer service life and better stopping power.

just like any other disc bake job colapse pistons replace pads just standard hand tools will do the job.be carefull when you put the bolts back in that hold the caliper they strip real real easy

you mention replacing the discs/pads. how long ago? the fault described is usually caused by warped brake discs as you mention it comes on the onset of braking. i advice replacing the discs.

Go change it at a auto place or you can buy the brake and do by yourself

90% chance you are being scammed. This seems to be routine at a lot of franchise places i'm afraid.

Make sure all the caliper slides are free from rust and make sure they are lubed. It sounds like the caliper isn't floating on the bracket.

Looks like you need to change the brake pads sooner than later, the brown residue is the brake dust and the burning smell might be the dust hitting the the tyre.

make sure your e-brake isn't on.

A big pair of channel locks will collaspe the caliper but it does take some muscle or you can release the brake line nut and releave the pressure but then you would have to bleed the brakes.