Hi!!
AFAIK Janes Addition have three albums.
Nothings Shocking - with 'Jane Says' (1988)
Ritual de Lo Habitual (1990)
Strays (2003)
There was a big break up (drugs etc haha) in the 1990s and the guitarist (Dave Navarro) joined the Chili Peppers for one album (One Hot Minute). They reformed last year with a new album (played on Jules Holland - which was IMHO a bit of a shambolic performance!!)
I saw them in Manchester last year and the last encore was Jane Says (with the kettle drums!). Actually the album version just really fades out with the drums, and the concert version was amazing - just normal lighting, all the band in a row at the front singing along. Amazing how effective such a simple song (two chords all the way through I think). Almost brought a tear to mu eye!!
Anyway, hope this helps - you can certainly pick up the first couple of albums cheaply. Even if you don't like the rest of the stuff just buy the first for Jane Says, play it at max volume and imagine us lot at the Apollo last yearsinging along!