YAY! My wonderful Boyfriend fixed it
Soo we tried both wacoms on his PC and they worked fine in the TVPaint demo, and our computer setups are pretty similar.
On my PC we:
-renamed current config file from the TVPaint config folder (to make it void)
-restarted tvpaint for a fresh session, which recreates a config file
-kept windows ink on
and now I have right hand click and pressure sensitivity on my intuos 3! HURRAH!