Getting tape residue off windows, and holding broken ones up?

I favorited pastabagel but wanted to loudly second it as well. I had a car with this problem and astonished myself by being able to fix it when I took the interior door panel off. The window never rolled down again, but it never FELL down again, so I considered that a success. Just go slowly, take pictures to remember how things look, save all screws, etc. Look into beginner's auto mechanics' classes at a community college or trade school. They'll be useful to you and will cure your allergy, and in the short run you might find an interested student willing to fix the problem for free or cheap.

At our shop if the customer doesn't want to pay for a new window regulator, we will cut a piece of wood and jamb it under the glass inside the door to keep everything from moving. It sounds hokey, but this is the only thing that works on a consistent basis, and keeps people from calling back and saying the glass fell again. Cut wood. Jamb that shit in there. Done deal. Get a good single edge razor blade, spray goof off onto the glass and go to town. We have glass in our shop all the time that is covered in adhesive residue and this is what we do. No need to get some crazy caustic crap to remove the adhesive. Spray it down. Let it soak a bit. Scrap away.

http://www.goof-off.com/ will remove the residue. Back passenger window maybe not so bad, but not having a operable driver's side window would be a show stopper for me. Junkyard window regulator? Barter with someone handy?

Nail polish remover and a razor blade will de-gunk. If you're not adverse to sawing, some little wedges of wood driven into the well alongside the window will hold them up. (I drove a notorious beater in high school. Because I'm from Maine.)

You should be able to hold the windows up from the inside of the door. There's a part, most likely plastic, that used to hold up the windows. You can replace this part (called a regulator) which will allow the windows to roll up and down again or you can just prop them shut with a block of wood. Either way, you have to remove the inside door panels (which isn't as hard as it sounds: they are only held on there with a few screws and a handful of plastic clips and is the same procedure you'd use if you were changing out the stereo speakers). Oops, I just read that last line about being allergic to working on cars. OK, http://www.diytools.co.uk/diy/Images/DB_Detail/477979.JPG from the hardware store. Cost about $1.50 each. Ram them in between the glass and the door frame.

Lighter fluid pretty much gets any glue based sticky thing off pretty much everything. It's the cheapest way to go.

Seconding lighter fluid. It works better than nail polish remover or paint thinner, as well as goof-off and goo-b-gone and all those other things, and costs almost nothing.

Too bad you're "allergic to working on cars." With a screwdriver you could pull the door panels and either fix the window regulators or prop up the windows permanently with some wood - all in a leisurely afternoon of drinking beer & listening to music. It's quite therapeutic and will likely gain you some points with the g/f. Just sayin'. Failing that, however, you can remove the gunk with any of the above methods (I recommend augmenting any of them with a razor blade or three). You may want to consider laying a hefty bead of silicone sealant in the upper window channel and bracing the window(s) in place until it sets. It'll be waterproof & should last a good, long time. Good luck!

Nthing the razor blade suggestion. A razor blade and virtually any variety of solvent will get most anything off of glass in a jiffy. Ethanol works pretty well. If you have any everclear laying about, give it a shot.