Mini will not work with anything older than a Premiere 4/4XL, 4 tuner digital only models. You would have to use another Tivo box with Tivo subscription.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD (XL, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!