If you can't get it into any gear, then the problem is more likely to be the slave cylinder or linkage. If the disk or pressure plate are worn out, you should be able to select a gear, but you will have slippage. If the clutch cannot disengage, then the trans will not go into gear. Try selecting reverse. Depress the clutch pedal and if it grinds, then your clutch is not disengaging and the problem may very well be the linkage or slave cylinder.

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.