Trooper Future need help

Ok... i have a '89 isuzu trooper 4x4 XS and its still stock and still planted in my yard lol with 211k miles on her and something really wrong ... if anyone can help and tell me why she wont move ... 5speed 4wheel high and low ... welll went to pull it outta the driveway and she locked up when i hit the brakes... after a few presses of the brake pedal and lots of frustration it let loose ... and in first get at 5 grand she barely made it back into the driveway... we could push it faster then it was trying... yes it still rolled fine but would move fast at all... then i parked it and now it wont move period ... the back tired are locked harder than a padlock... we tried to force her to roll forward then backwards ... in result the truck didn't move, bent the *** outta my moms car bumper, snapped to tow cables, and made a 4x4 chevy tracker look like a scared dog on a leash... so we gave up on moving it cuz nothing was budgin it... haven't tried putting it in 4W cuz i'm afraid i might snap sumthin if i hit the gas... she wont move and i'm not sure what to do. ( also ) i plan on putting 32' - 11.5' allterrains as recommended by others on forums. and maybe later on a stronger tran and a V6... add your comment i would greatly appreciate it!
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