The real way to check is to put a fuel pressure guage on the fuel rail and connect the "Prime" connector (green connector that is loose behind the battery) to 12v. Over 20 psi and the engine should run.
If the car sat for a long time, particularly with only a partial tank of gas, it is likely to have gone to gum and varnish and clogged the sock, fuel pump, and fuel filter. Running out of gas just aggravates the condition.
I would not be draining (the hard part) or dropping the tank to replace the fuel pump until checking everything else out first though.
As far as a manual is concerned, the factory manual is the only one worth having and are around, might even find one on e-Bay.
There are starting to be a number of scanned manuals available on the 'net for download if you have a high speed connection - the manual for a 1990 Buick Reatta/Riviera (same drivetrain) is at http://www.reatta.net/docs.html
but you will need to register first.
I just went through the process of getting a gummed up Fiero running again and if that is the problem you will need to flush the tank.