I bought a 1994 Oldsmobile Cutlass Ciera

I bought a 1994 oldsmobile cutlass ciera. About a month and half later I was driving in reverse for about 20 yards and my wheels locked up and skidded to a halt. When I pressed on the brake, my brake peddle was hard and not depressing, then when I tried shifting into drive it wouldnt shift easily into drive (I had to force it.) Finally I got it into drive and accelerated forword with no problem. But then 5 miles down the road my front wheels locked up completely. (Fwd) Would not move at all. Same problem as earlier with the reverse. I dont think its the transmission because when I would shift from (P) to (R) it would jump smoothly into gear. Same smooth jump when shifted into drive. I had power in the drive train, It wanted to go but the front wheels wouldnt give. WHAT IS MY PROBLEM? And can I FIX IT MYSELF? Oh Yeah! Its not break pads cause break pads were not touching rotor. I also disconnected ABS Cables and still to no avail.