Go into a photo shop and ask for any film and they'll look at you funny - even a decade ago film users were a peculiar bunch, now they're like the freakshow at those old circuses. :P
To the best of my vague and incomplete knowledge of the archaic technology, the film is b&w - you do darkroom processing to add a sepia/selenium/cyanotype/etc tone and make a b&w image monochrome. Or use a cheap scanner. :D
Aye. Although it can produce one-bit bi-tonal black-and-white images, the majority of stuff will be monochrome.
I used to enjoy messing around with grain on the 100 iso films. 'Course you can change ISO at the flip of a switch now, but seeing real film grain is so much better than digital noise.