congrats on the purchase!

window problems are pretty common.. do a search for SBC or street boutique customs

he makes a bracket to help fix the windows... more than likely the tabs at the bottom of your window are broken... could fix the air leak too?

ABS light is pretty common too.. occasionally a sensor.. more than likely the abs module under the hood is toast though.. costs about 2,500 from a dealership.. i picked up a used one from a wrecked VX for 100 (i think its the same as from a 4 wheel disk brake rodeo too).. pretty easy installation, took care of my problem, i did a write-up on how to replace the module if you search for it

any other info on the brake problem? does it come from the calipers? the brake pedal itself? does it happen when you are moving or just when you are still?