the 180 has a manual shutter indeed. there is no battery and no meter. try to change the speed to B and back and look what happens. sometimes this may help. the shutter may stick after some years.
and yes, fuji 100C, 100B and 3000B are compatible. for the the first two pictures it may be a bit hard to pull them out of the camera, as fuji packs 10 instead of 8 for the old polaroids.
what a beautiful camera you have, Tom! I always wanted to have one of these but they are too expensive. so take care of yours.
reinhard