Sounds like the sliding tracks that the window rides on (called the regulator) are old and the grease that is used to lubricate the track is gone, all dried up, or the track has simply worn out from use. The window usually has a plastic piece that rides in the track and this wears out, causing it to hang up and turn crooked in the track.
For the fronts, you'll probably need new regulators since they are used the most. New ones run in the $40-50 range with motor and your car is very popular so finding new ones should be easy...or good used ones from a junkyard for less.
The rear regulators might be salvageable by cleaning the old dried grease out and smearing some new all-purpose grease in there. If you have to scrape it out, use plastic scrapers and carb cleaner. This is best done with them removed from the door, so mark where the window sits in the plastic rider before removing it.
When reinstalled correctly, the windows should slide straight up and down without wobbling in the track or turning crooked. If so, this means the window isn't balanced and needs to be repositioned in the rider bracket.
Good luck!