my rear rotor is stuck on and their are 2 bolt holes to put a bolt in and press it off. what size/threads should i use.

M8x1.25

 

also make sure the parking brake is off.

the bolt that you take off to get the caliper up is the same size at least on mine.

where could i get these bolts. would a hardware store have them.

yes

You do have the parking brake off right?

You might also try loosening the parking brake adjuster. On the inside (back) side of the backing plate near the bottom there should be a rubber cover. Pull that off and with a flat blade screwdriver spin the gear looking thing up.

 

... You'll just need to re-adjust it when putting things back together..

the funny thing is, the e-brake don't work. i can pull the handle up and still spin the wheels