Delete your duplicate post.
And, hey, everyone has to start somewhere.
It is pretty simple. 1. go buy a chilton's or haynes manual. yea, they are a bit generic, but they also explain procedures like this perfectly, with photos! YEA!
But. I will give you the short and dirty.
Needs:
1. Brake Fluid. DOT rated. Buy 1 or 2 large bottles. You may well replace all your brake fluid.
2. Self brake bleeder. All it really is a little bottle with a magnet and a one way air valve. You will attach it to each brake bleed valve at each wheel, as you flush the line/bleed it. It keeps air from getting in, by submersing the line in fluid.
Tools. And beer. Always beer (unless you are too young, then soda.)....
How it works. The simplest way to flush your lines is to pop open your brake fluid resovior in your engine bay and pour in a ton of new fluid.
Walk to your back left ( I think) someone will correct me. Always start at the rear. Jack up your truck. Pull the tire, for easy access. This isn't always necessary, but it makes it easy. Besides, pulling the tire gives you a chance to rotate tires or check stuff out while doing this.
You will see the bleed nipple. Literally. It looks like a small nipple with a hole in the center. This is the bleed valve, and it will be on the caliper assembly. You will take your self bleeder bottle, attach it to the body frame with some fluid in it (enough to keep the tube inside covered) and then it is simple....
Pump away at your brake. You will be pushing all the old fluid out. The first line you do will do most of the work. The first one will be used to push all the old fluid out of the resoviour and booster out. It will look burnt/dark. Keep pouring NEW fluid in the resovior, and keep pumping, until ONLY CLEAN fluid comes out.
Then. Assuming you have kept the self bleeder on, and no air is in, which it shouldn't. Done this many times, no problem. You close the valve. After the first brake is done, you will have removed about 70% of the old fluid. You will just need to flush the actual individual lines that run to each other tire out.
So. After that rear tire, move to the next rear tire. Repeat. Pump until only clean fluid is leaving the valve. Make sure you keep adding fluid into the engine bay.
Move to the front. Repeat.
After you have done each tire. Close everything up and try to pump up your brakes. Turn on your car and test for sponge like feeling, this happens if air gets in. If so, you will need to bleed the system.
A haynes or chilton's manual will describe this in precise detail. Every beginner should get one. It is true that over the years they have become less advanced, but they are an awesome beginners tool.