My 97 Toyota Celica won't go out of neutral

No engine told and worse no transmission told
let me guess car has clutch pedal 99% here in USA never seen nor dreamed of ,right and I have one too,for 6 decades me,
first one for is honda motor cycle and 30 + others later.
all cars with any M/T box the clutch will fail. all do about 2 times longer lasting than a A/T box, my record is 150,000 miles
but was only a clutch slave cylinder bad.

your clutch is bad.
do the 2 man test.
but first, see if DOT4 fluid leaks on MC , bothsides of fire wall
MC = master cylinder for the clutch
the look at the slave at the bell. no leaks, never have I seen one now leak at 25 years old that be impossible ever.
the 2 man test, you pump the clutch, pedal
and person 2 looks at the slave and most move about 1 inch. 25mm
click see slave work here ,it must move fully !!!!!
https://fixkick.com/videos/FLV-all/showtime.html#CLUTCH





..........
replaces it must be bled just like brakes.
see the rod,that is what moves. (slaves goal1)