All electric. Any ideas how much it would cost to fix the problem?

Sel it now. more problems to come.

could be just a fuse missing
it may not cost too much! have someone you trust
check it out to get an estimate
good luck

it sounds like a fuse look in the owners manual

try getting a new battery

Well, the windows get power from fuse ''F'' in the engine compartment fuse block, & fuse 6 in the dash fuse block. Then it goes thru the safety relay to the master switch on the drivers side. If all windows r all inop, that is where l would start. The trunk pull down motor gets its power thru fuse ''1'' in the dash fuse block.. but those motors r notorious for going bad.
With electrical concerns, there can also be other problems, loose connectors,corroded wiring, open splices & so on.
Always check for power first, then just keep checking from component to component, & finally checking the grounds.
l did not say to replace parts, check them first.

Hope it helps..