Do not try to move that clutch until you get a look at it visually!
being as i find barn finds all the time that havent run in years i can tell you from experience its a rusted input shaft/pressureplate and flywheel.
if you want to try to break it freee this is what usuualy works for me when i see its not too bad.
jack the car up and put the rearend on jackstands.
place some blocks infront of the front tires and fire that baby up and get her to about 40 mph and slam on those brakes to try to help break it free a little do it a few times and try working the pedal a little.
this is assuming that it is stuck in a gear and not in N pistion. good luck!!!