The linings look new, however, in the top picture, the return springs are attached, and in the second picture, it looks like you use a plier to straighten the hook end to remove the spring. This has effectively destroyed the integrity of the springs and they are going to need to be replaced. Problem is that today, finding springs with the proper tension is getting a lot more difficult, with most replacement parts coming from the other side of the world. The quality just isn't there. To remove the return springs, there is a specific tool, and one end of the tool removes the spring, and the other end will reinstall the spring. You will need to rebuild the wheel cylinders, or replace them, depending on there condition once you take them apart. Also, the rubber hoses will also need to be replaced, and even possibly the metal brake lines, depending on condition. Metal brake lines rust from the inside out when a car sits for a long time. Also, the metal fitting that attaches the brake line to the rear wheel cylinders might be frozen to the metal brake line itself. There is also a special tool for removing and reinstalling the brake line nuts. It is called a tubing wrench, or a flare wrench. You will only need one size in all probability, so you would be better off buying a quality one, such as a Snap On or Mac, since the cheap brands tend to spread under pressure.
When it comes time to clean up the rest of the brake assemblies, spray them with water, the using a cheap bristle paint brush and dish washing liquid, scrub everything till it is clean. Then rinse well with water. Your lungs will appreciate it 20 or 30 years from now, if you don't fill them with asbestos now.
In the future, if you are not certain how to take something apart, ask first, and you will get the help you need. If not, you are destined to do a lot of unnecessary damage to rare and difficult parts to replace.
