Autopart store pads can be good or bad. The general rule of thumb is: you get what you pay for. I would go with OEM brakes. Yeah, they are expensive but...they are relatively silent compared to most autopart store pads and they are relatively high quality.

I wouldn't recommend even touching the bleeder screw. Just compress the front caliper piston with a C-clamp or piston compressor tool...shouldn't be a problem.

The rear requires you to screw the piston back in. Use a flat head screwdriver to do this or go and buy a rear piston compressor tool. Also, be careful not to twist or tear the piston boot when backing the piston back in to the caliper.

One last thing...lather the back of the pads and contact points on the caliper with the supplied anti-squeal grease.