17 years! might that fuel be basically just sludge by now?
I think I might be inclined to maybe drop the tank and 'pour' it out (adding fresh fuel to dissolve and clean) - rather than risking trying to pump sludge that might clog/block pump/lines/rail etc!
In your case after after 17 years the oil will likely be a thick emulsified sludge too - defiantly don't not try starting without changing that or you'll block up the oil pump, pathways, pickup etc - best it would be a messy sump off job to rectify, worst you gunk entire engine and it needs costly complete disassembly and rebuild. I would probably change it before even hand cranking the engine tbh.
For complete recommission I would do this order:
drop oil
change oil filter
fresh oil
spark plugs out
turn engine over by hand using wrench to confirm engine is not seized
fit new cambelt kit (inc tensioner)
fit new aux belts at same time
new spark plugs
drain coolant (bottom radiator hose)
new antifreeze coolant (use the good 5yr+ stuff)
drain fuel tank
plenty of fresh fuel in
disconnect fuel line at engine end
pump the fresh fuel through the line until fresh fuel comes out
reconnect fuel line at engine
new air filter (old one may have disintegrated, don't want that sucked into engine!)
new battery
try start
*VERY RISKY* option; If you don't want to spend out on new parts/fluids for an unknown engine to just check it starts the VERY RISKY option is:
check air filter hasn't disintegrated (remove/replace if so)
plugs out
check engine turns over by hand
plugs back in
drain oil
drain fuel tank
fresh fuel
try start
DISCLAIMER, you risk engine damage if you run engine for more than 1 or 2 seconds with no lubrication! Same with your cambelt braking as the pistons will smash into and break all the valves. Both cases will need rebuild. It may take a while to start on cranking as the old fuel in the line likely won't be combustible and there is some risk of blocking injectors and saturating plugs.
Obviously if it started OK for those 1-2 seconds, do all the other stuff from first list, new oil, coolant, cambelt, filter etc etc.
If it's seized, there's a load of various tricks to unsieze, hot oil into the cylinders etc.