As Valles says really make sure you have fuel delivery, but it sure does sound like you have lawn mower disease (move car to get lawn mower).....850 no start big time.

So the things you did typically work....hmm I had it bad like you once. I think maybe you have valve deposits on the sealing edges of the valves so oil in the cylinders probably won't help make compression in this case. Either a professional blasting job and vacuum job, head removal and cleaning (yikes), or my homemade method (worked for me)

1) Add some good combustion chamber cleaner double strength to the fuel system (really helps if tank is low)
2) Remove spark plugs and while friend turns car over blow 135 PSI air in each cylinder, repeat. Car is turning over fast with plugs out, so as corny as this procedure sounds, it may dislodge enough crud just to start the car. Check the compression, a checker is cheap!
3) Now drain and change oil (with plugs still out). Allow to drain well!
4) Put clean, dry (new) plugs in, make sure battery is FULLY charged. Cranking may take awhile..20-30 seconds each time (seems like I just guessing here) but mine did stumble to life....really ragged even until it warmed up, then begin to smooth...then I drove the car pretty hard to blow it out.

Hasn't done this since I switched to synthetic oil....but then again I don't just start the car to move it.