My Toyota pickup sr5 doesn't want to start ... Check the fuel pump its fine ... Its firing all six piston ... Nothing wrong with the spark plug nor the wire so what can it be?

forgot to check all fuse first
gas engine, sure
then scan the PCM as it cranks and fails, oops this must be done
all car ran before so what matters is now and only now.
cranks great but will not start has up to 50 cause , both engine and EFI causes.
if the engine is good (IDK) compression tests pass.
then check spark if there is no spark it can not run. or if the PCM
detects spark bad it cuts fuel hard. all cars gas do that.
pure PCM hard coded logic inside.

lots of causes. bad engine, bad spark or bad fueling
even bad fuel or wrong fuel put in the thank or sabotage..
car is 23 years old and cars LOVE to fail that old and for sure not serviced every year. or 60k miles up ,repeat service.
lets say spark is bad this engine uses 2 paired spark coils
called wasted spark if 1 plug nor HV fails 2 slugs go dead, doomed
sorry will not run on 2 cylinders ever.
so put in new spark plugs and the 4 HV wire sets, do them 1 at a time and not wreck firing order, 1,3,4,2
sorry those 2 things do not last 23 years ever, now why Jose'

was the cam chain screaming its guts out for long time? oops
bad act that.
2RZ-FE I4

if scans to not solve this,
check fuel pressure next
by the book.

if the chain fails, this engine is interference and valves bend
see words here
https://en.wikipedia.org/wiki/Toyota_RZ_engine#2RZ-FE

Your fuel pump could be week or fuel filter needs change.

There are still many possibilities. The internal combustion engine is a complex mechanism. The timing could be off. All spark plugs must be firing. They must fire at exactly top dead center. The timing chain/belt must be in good working order, not worn or stretched. The cam shaft must not be worn out so the valves open and close correctly. the valve lifters must be working properly. the cylinder heads must have the same correct compression. A different compression indicates bad valves or head gasket. Piston rings must not be worn out or they will not provide adequate compression. the oil pump must circulate the oil to lubricate everything, and provide fluid for hydraulic lifters. Oil and filters must be clean and the correct type for engine and climate.

sound like vechicle not getting fuel.check for fuel pressure could have blowed fuel pump fuse or fuel pump failed.

Fuel pump assembly.

check to see if u have fuel going to injectors or fire to spark plug if there is no fire coming out of distributor replace pickup coil inside distributor

you will need to drain the fuel in the tank and replace the fuel filter and plugs after a couple years the fuel will go bad and it will plug the filter and foul the plugs if you do those 3 things and in that order it should start it is important even though you have good fuel pressure that you replace the filter to prevent damage too your injectors

Check for plug spark to see if problem is fuel or ignition.

fuel pump reley ???

More than likely either the ignition control module, the stator or the pick-up located in the distributor.