Yes !
If you physically can not move the gear shift lever into gear, it could be a problem with the shifter linkage or the transmission. If you can select a gear by moving the the lever which is attached directly to the transmission, it is the linkage. If the lever moves into a gear but the mower doesn't move, it could be a broken belt or a bad transmission.
Generally a parking brake system would be the parking brake lever (either a hand activated lever with a ratcheting lock and release lever, or a foot brake pedal with a ratcheting mechanism that releases when pushed to its maximum.), cables continuing from the parking brake lever to the rear drums, and the parts inside of the standard rear drum brake that are activated by pulling the cables. This system is used to prevent a car from moving when parked on an incline, or to prevent the transmission from jamming in Park which can happen when towing a load or parking a heavy vehicle on a hill.
The parking release lever of C240 looks like ratchet.
A small release lever just in front of the parking brake foot lever
The 1992 GMC parking brake release lever can be found on the bottom of the dashboard. Pulling the lever towards the passenger compartment will release the parking brake.
You can remove the parking brake lever, from the brake shoe on your Chevrolet Cavalier, by removing the retaining clip. The retaining clip connects the brake lever cable to the brake shoe.
There is a lever above the parking break that you pull by hand.
The linkage that connects the shift lever to the transmission could be out of adjustment or the reverse gear in the transmission itself could be bad. Usually it's the linkage.
The transmission linkage connects the shifting the lever in the passenger compartment to the shifting lever on the transmission. You will find the shifting linkage on the side of the transmission.
The worst damage could could have done is to bend the parking pawl in the transmission. As long as the car still goes into and out of park with no problems then you probably did no damage.
the manual release lever is attached to the parking brake pedal assy
There should be a lever down by the brake pedal. it will look kind of like a gear with a tab on it. that lever releases the parking brake. just be careful not to let the parking brake pedal smack you in the face....