4 wheel ABS air bleed

[stupidtech]

I bought a '97 S10 LS Ext. cab pick up from a guy who was a @#$&**$!!! (let's just say wasn't too honest). He did mention that before he bought it somone must have changed the brake booster. I noticed after I got it that all the brakes were shot and the front rotors were turned way beyond safety standards (there was a lip from going down so far). I further noticed that the front brakes stay on slightly all the time and the rotors were blue and burnished. Somone tell me if this sounds correct. The #$%$%!! changed the brake booster and somehow got air into the ABS module and never took care of it, this other @#$#$ bought the truck and never took care of this, instead he just kept slapping new pads on everytime they quickly wore down, also the heat caused by this process ruined the rotors everytime so he just kept turning them, and the heat also ruined the bearings on the pass. side front brakes. This is my guess. I changed all the brakes and the drums and rotors, tried to bleed off the air in the spongy pedal (which was like that before I started to work on it). I was not sucessful, and I noticed that the book says if air gets in the ABS module a dealer has to fix it. I read the post from GMMERLIN to rouser and was hoping there just might be some other hope beyond the dealer or if there is another way to solve this, or if I'm wrong all together. Any help would be appreciated. Sorry this is so long but I wanted you to see all the details.