My son was driving home last night and opened up the window. He said that he pushed the button and the window went down about half way instead of all of the way. He said that he tried to roll it up or down and it didn't work. I went out and tried and couldn't get it to go up or down either. All of the other windows are working fine. Unfortunately, we bought the car used and it doesn't come with an owner's manual.

Not sure what to do from here. Are there fuses that I can check? What other options do I have besides ripping the door apart to get to the regulator?

Any help would be sincerely appreciated...

There certainly is a fuse to check. Location is shown in your owners manual, available at toyota.com if you don't have paper copy. If that's not it, the only alternative to opening up the door is paying someone to do it.