Front disc brakes:

I can remove the caliper and replace the pads but have trouble removing the 2 screws holding the disc(red circles), I’m not even sure they’re used for holding the disc.

Do I need to put screws into these holes(green circles) to get the disc out? If so, what size?

A better view without the circles:

Rear drums:

Can’t get this cap off(red arrow), is it removable? Without removing it it’ll be very cumbersome to work on the brakes, especially when I’m trying to gain access to the hand brake cable and the springs holding the shoes together.

Also can’t remove these springs(red arrows) holding the shoes together on the top side and bottom, I’m sure there’s a way, how do you guys do it?