Tivo basic service is basically the guide data and nothing else. Tivo service for most other Tivo includes everything including streaming and transfers of recordings.
Tivo uses something like APM (apple partition mapping) and not anything like what's on a Windows or MAC drive. Using those tools from a windows or MAC system will not work.
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!