These things can be tricky by keyboard---- Does this have a hydraulic clutch which is likely.?? If so there will be a smaller master cylinder that usually uses common brake fluid and should say so on cap. It shouldn't use fluid so there is probably a leak if so.
There could be some kind of interlock system to prevent car from starting unless clutch is fully depressed. Most don't stop the key from turning as mentioned but just don't let current go to starter. First thing is to fill it up if low with correct fluid - usually DOT3 brake fluid. Certainly check and then look for leaks. This happening just after jacking up car could be a cooincidnece or is it possible that the jack was misplaced and damaged a line or the recieving end known as a slave cylinder. If you find something they get fixed much like brake hydraulics.
Always use a safety jack stand when jacking up a car and getting under it!!!! Use care where you place the lifting jack.
It's possible that the two problems are related but I think less likely. Post back with any observations and we keep trying, best,
Tom Greenleaf - MetroWest Boston - USA
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http://www.autoacsystems.com/tomgreenleaf/