Interior lighting

There should be a lot of lights up front. There are two under the dash, one in each door, then the vanity lights for the mirrors in the visors as well as map lights in the mirror and a light in the glove box. If those are missing then someone must have removed them. Or they are not working as they should. First I would look to see if you find them at all. If you do find them but they are not working then they may have been disconnected. The attached wiring diagram has a green dot next to the lights that should come on in the front of the car. As you can see there are a lot of them.
I would probably see about taking it to a shop before you buy it, have them check it out to see if there are other things that are missing or not functioning. It is possible the lighting control module has an issue but that should stop all of the interior lights from working. Perhaps they just removed the bulbs? Not sure why one would do that though.