Sounds like the control rod, that runs to the interior door handle, either fell off or the clip broke. Not a hard fix - but you will have to open up the door to find out exactly what is wrong. if it fell off - you need to pull the control rob back out and reattach it to the handle. If the clip broke - same procedure, but need to get a new plastic clip. A junkyard or salvage yard would be your best bet. Not sure if you can buy just the clip at the dealership - as I don't see a separate part number for it in my electronic catalog (could be out of date).
Well, that Toyota part is what the dealer said would cost so much, plus labor of course. It's whatever that control rod goes into on the opposite end of the door handle that he said was broken.
My task, then, if I should decide to accept, is to figure out how to open up the door to look in there to see what's going on. I'd have to get my power window controls off some way. Guess I'd better find a Haynes and see if it's anything I want to tackle.
Thanks for your advice!