I'm glad this thread exists because rare optional extras are just plain cool. Toyota offered a bunch of odd extras for the Japanese market Starlets throughout the 90s (although you could get them on pretty much any JDM Toyota from the time). Some of these include:
The Navi Boy, which was basically an electronic compass.
The aptly named Secret Box, which was a storage compartment...
...which flipped open to reveal a combination lock. Was apparently intended to hold jewellery and credit cards.
The Air Fantasy unit, which would spray one of three different perfumes through the air vents, and was controlled much like a climate control system. Apparently, you can go into a Toyota dealer today, and provided you know the part number, still order some refills of each of the perfumes.
Magnetic map torch
There are a whole bunch of other optional extras that are definitely rare, but I mostly picked out the strangest ones. There are a few other interesting ones, including a proper colour sat nav/GPS system and TRD racing paraphernalia, which meant you could buy one from factory with a roll cage, bucket seat and harness if you wanted.