My 76 stag has been unused for the past two years due to lack of funds. Today I attempted to move it out of my garage in an effort to begin preparing it for the summer ahead. Starting it was no problem, trying to select a gear was impossible (manual od gearbox). After researching a few posts on here I concluded that the clutch driven plate was most likely stuck to the flywheel. So after thoroughly warming up the engine I switched it off, depressed clutch hard down, selected reverse gear (the stag was forward facing in my garage) and attempted to start her up in the hope that the torque snatch of starting would cause the clutch plate to seperate from the flywheel. No luck with this although the car did move approx 3ft out of the garage, I then found that it was stuck in reverse gear and I couldn't move the gear lever. So I jacked up the back end lifting the rear wheels clear of the ground (supported by additional axle stands) in an attempt to reduce the mechanical load on the gearbox, this worked as I was able to take it out of reverse and select any gear. At this point the clutch still appears to be stuck and in addition the back brakes are locked solid despite not using the handbrake whilst laid up. Also there is a metallic clanging noise coming from the bell housing / gearbox area, this clanging of metal on metal increases in frequency with rise in engine speed when any gear is selected whilst the car is jacked up. Has anyone come across this situation before, any suggestions as to what it may be or what damage I may have inflicted on the car and what I need to do to remedy it would be most welcome.