Here's a good multiple bit Torx driver
http://www.amazon.com/Milwaukee-48-...37444346&sr=8-1&keywords=milwaukee+48-22-2103
There's a couple of tight places, back tupperware screw under the seat is one and I can't right off hand remember the other, where I found a short torx bit, turned with a 1/4" open end wrench or gear wrench works best. A 10mm open end or ratchet is a commonly needed size.
At home an angle drive like this,
http://www.ebay.com/itm/SIDEWINDER-...URN-T-BAR-HANDLE-3-8-INCH-DRIVE-/391202060451, works great to get to the hinge bolts that hold the seat.
These are just a few that I've found are handy to have. I carry the torx driver in the frunk.
If you add farkles that use SAE size screws or bolts you'll want to have some tools to handle them.