Just got '75 280z!

After what feels like months of searching, I finally found a decent 280z in town! Has some rust bubbles and the paint looks like a Maaco or Earl Schibe job, but nothing real major. Frame rails in the engine bay are pretty good, especially compared to what I've looked at before. Floor pans feel very solid, are still fairly clean and painted the original white. Dash is cracked and clock doesn't work... Surprise, surprise.

I was able to drive it home, though I discovered that it has a lot of problems.

The seller told me it was missing on one cylinder, although I didn't notice this.
Seems not to have much power, especially between 1k-2k rpms.
Transmission feels very sloppy, for lack of a better term. The shifter moves around way too freely, almost as if it's loose or something. On the other hand, I didn't have any real trouble with it. Went into all gears fine, no grinding.
Clutch seemed to slip a bit.
I can smell some burning oil while driving and my brother said that there was some periodic blue-white smoke.
Fuel gauge doesn't work at all, it's stuck on empty with a full tank of gas.
Some rear-end clunking on shifts if I don't baby it. Not nearly as loud as the rear end clunking in my '85 though.
Cold starts require quite a bit of cranking to get it fired up.

Like I said, I got it home with no trouble. I then stalled it going over a bump into my garage, and now it won't start up again! I haven't had any time to spend diagnosing the problem; it's midterms week.

I'm sure some of these are common problems, and I just haven't had time to search for answers yet.