there are two bolts that connect the caliper to "floating rods" These rods go inside a bracket that the caliper sits in. Once you remove the caliper the bracket should still be attached to the car. I think from memory to remove the bracket you will need with a 15mm or a 17mm spanner. Once you remove the bracket you should be able to get the rotor off if its not rusted on. Just realized you already had the caliper off You can use some penetrating oil such as WD40 to help other wise do what pat said