I'd get a matte black Ford Capri Mk1 hood, just like the one on that car, and use it as a magnetic board/blackboard.
I was going to say a pickup bed bed, but it looks like I was beaten to it. I've seen some cool car pool tables, certainly wouldn't mind one of those. Probably more user friendly than trying to get in/out of a pickup bed at 3am or something...
Either this Or this I wouldn't feel like using actual car bodyparts to make furniture, but using car seats would be fine to me
I would get one of those front cuts that are imported from japan like this: I would mount a flatscreen TV (I would use it as a monitor) on the dash, then Hook up the Pedals, wheel, and shifter to the electronics of a G25 or G27 wheel, hook it up to a computer in the footwell, add some seats, and there. The most realistic simulator ever. You still have the engine to tinker with, too!
I can't say this is really a proper answer to your question but it might help. In one episode of Mighty Car Mods they had to cut a car from Japan in half to transport it due to some funky import restrictions. Not sure why those front ends are just sitting there but I'm sure it's some similar weird import law.
You could take the spare pistons and even hang them on the wall, along with a radiation and small stuff like that if its your thing, perfect man-cave decoration material
I would use a car muffler as the stand for a lamp, the headlight as the lamplight, the car's electrical cabling for the power cable, and the fabric from the seats for the lampshade. Oh yeah.
probably will use the random extra parts as wall art I have a nose that I can paint and throw some lights in, a few trunk lids, a hood or two, three doors, 2 dash panels and a mostly complete set of gauges, a passenger seat, a rear seat back, a spoiler for each trunk lid (2 of them say TRANS AM on the back), a set or 2 of taillights a set of rallye ll's , a sub-frame(table? IDK) ,2 radiators(one from my car,one from my dad's 94 DSM), a set of rims from said DSM a set of steelies from dad's truck, a set of old olds 403 pistons a front mount intercooler that didn't fit on the DSM without removing the bumper bar(safety first!)the original turbo and manifold from the DSM(has a 20g now) and some more stuff if my dad can get his parts back from a friend he had work on the car a while ago Spoiler: rant on why you should do things right thre first time (didn't turn out as expected and hasn't run right since and mom is unhappy because when it does run the turbo lag is massive so it's not as responsive anymore as it was with a 16g that currently is with it's ported manifold in Georgia at dad's friend's house and it still leaks oil,witch is why it went there in the first place, btw it was there for a year and a lot of stuff that should have been done wasn't)