Don't go taking the struts apart. Those two lower bolts are the very precise camber adjustment. That's part of the alignment. If the hub won't turn, you have the transmission in "park" and the other wheel can't turn the opposite way. Either shift it to neutral or jack up the other tire off the ground.

For the wheel cylinder, place the shoes inside the drum to see if they're the right diameter. If you have the smaller diameter shoes they will have to move too far and the pistons will pop out of the wheel cylinder. That should cause a real low pedal too. Also check that the shoes are adjusted up properly. A parking brake cable that is stuck in the partially-applied position will prevent the self-adjuster from doing its thing but that usually won't cause so much misadjustment that a piston comes out.