ok so I've been searching for a week and i can not find this bulb number for the map light ! can someone please tell me the bulb size for this map light I'm going crazy and no i do not have the bulbs that go in there to compare them to others or else i would have done that already!!! ahahah i added a pic of that the map light looks like i believe its a 1st gen map light thats in my 86

 

My '87 4Runner uses a small bayonet type bulb, similar to instrument bulbs in 1950s cars.

I believe a #57 is of the correct type. I changed mine out for LED equivelent bulbs.