Clutch pedal engages really close to the floor

SOURCE: 1991 Toyota pickup 4WD clutch slipping

There is an adjustment for the clutch pedal under the dash where the push rod goes thru the firewall. There is only aprx. 1/2" of adjustment so be careful when making an adjustment, if your clutch is slipping then you need to shorten the throw of the push rod.

SOURCE: Clutch pedal sometimes engages when near floor

Hi. Let me try to lend you a bit of assistance, also.
My fellow expert Benimur is very correct with his input to you.

But...Air does not get into your clutch hydraulics unless the fluid has leaked out at some point. As long as the cylinders and tubes are intact, I would doubt that air is the issue. Short of pulling the transaxle, and inspecting the clutch, there is really no other way to determine your issue properly.

Personally, I think that you haven internal problem with the clutch assembly. It could be worn fingers on the clutch plate, a worn clutch disc, or something as simple as the throwout bearing is hanging up on the input shaft collar.

If Beni's suggestions does not help, you are going to need to pull the trans off, and inspect the clutch items mentioned above.

Thanks for choosing FIxYa, we wish you the best of luck; let us know how it turns out.

SOURCE: CLUTCH ADJUSTMENT 1997 TOYOTA COEOLLA

This vehicle has a hydraulic clutch system check the fluid level in the clutch master cylinder it is located on the firewall near the brake master cylinder fill it if its low than check hydraulic system for leaks, possibly slave cylinder, you will have to rebleed the system if part replacement is neccassary

SOURCE: Hydraulic clutch grinding from 1st to 2nd - Toyota 1985 Pickup

Yes, your clutch might be worn and/or out of adjustment or the trans is worn. Your clutch may be fine also. Toyota's have a problem with there shifter bushings and seats. They brake and crack also causing shifting problems. And some times only one gear depending on the condition.If yours is broken,crack or damaged, you can find the parts from Toyota and there a whole lot cheaper than a clutch. Also I recommend adjusting the clutch if possible. Not all are adjustable. Check your clutch fluid.

SOURCE: toyota supra turbo 1990, manual (7mgte engine) Clutch problem

You ever think about replacing your rubber clutch line with a hard line or just replacing the rubber line