The shifter moves on the column & the linkage is moving but it wont go into gear on 1994 Ford Taurus

It had never slipped or had any issue suddenly wont shift into any gear when rev'd sounds like its in neutral the engine sounds like it wants to engage but cant ocasionally it can go in reverse but not for long

Asked by for the 1994 Ford Taurus
Check the fluid level first but most likely the torque converter or input shaft splines have stripped! Common problem for this transmission. In this case trans. will have to be removed for repair. More testing needed but that is the most likely scenario.
thanks, that's kinda what I was thinking, how much does this usually cost to fix?
Hard to say, depends on what is found inside the trans. after teardown.