Evil Smurf said:
The knife that is used in The Hitchhikers guide to the galaxy.
http://props.handheldmuseum.com/HitchhikersGuide/HHGTTG_BreadKnifeCap2.jpg
It toasts the bread while you slice it.
That's not really a vehicle though... Right? :S
OT: Realistically, some kind of unstealable, solar powered (with plenty of backup battery) car which is small but roomy, can pull a good weight, and can basically go on forever and ever. That would be sweeeet...
Otherwise, hmm...
Ooh! Ooh! Arm Phoenix from Total Annihilation:
http://images2.wikia.nocookie.net/__cb20120801181444/totalannihilation/images/c/c7/40.jpg
Doesn't seem to run out of fuel or bombs, and also has a small laser for self defense. Just travelling the world, with no one daring to stop me sounds good... XD