Do a search for the original tarptent plans, the bilgy tent, the ray way tent, and look through the diy subforums in the different backpacking forums. Ray way also has plans for making a backpacking quilt, there are several plans out there for making your own quilt.
If you're gonna be doing some actual backpacking (I.e. More than 5 miles a day, for more than 1 day) look into pepsi can stoves, supercat stove and the zen pressurized stove to save some weight and space over the wood stoves. Plus most parks don't allow camp fires or wood burning of any kind.
That being said, if you are just doing some car camping, it would hard to make something for less money, that would be as durable as just getting some Coleman gear. That's just about all I use for car camping, is Coleman brand tents, bags, lanterns, stoves, etc. They are hard to beat for the price, and they last forever.