Warning, this subject is old (6665 days without answer)
salvation
nice one, that would have been a cool TV series.
Hecubus
This was an unaired pilot done by Ben Stiller back in '99, and it's spend the past few years bouncing around the internet (youtube has it
here.
unknown motorcycle (***** - it's one of the main characters of the "show" and voiced by Owen Wilson)
Buick Grand National (**)
I think the exterior shot of the car is from stock footage, but they use the interior of an '86 or an '87 (it had a centre brake light)
Chevrolet Caprice