1995 Toyota Corolla Immobile vehicle

I recently returned to the country after a 3 month absence. Upon actually trying to drive the car, which was started regularly in my absence, I found that everything works, except the car won't move when I let off the clutch and give it gas. The tires want to move; however, a grinding sound occurs and I am not able to actually move forward or backward unless I let off the clutch completely.