2002 Honda Civic Baffling noise from engine and fuel leaking

Two weeks ago I accelerated my car toward an island in a parking lot, I didn’t see the island it was dark; however as I hit the curb on the island I heard a crack and a scrap from under my car, I then got out to see if anything looked broken or was leaking. I didn’t see anything, after a few days I noticed my gas was running out faster and faster i.e. I would fill my car up to half tank, park it, start it up again 12hrs later to find it was almost on empty. I didn’t smell any gas or notice any gas stains. Then a few days later the car started making a baffling noise that was coming from the engine, it would make this noise allot while on neutral like ticking and allot more when on first gear - third gear. I then took it to the Honda dealership to diagnose the problem, and they said it was probably a broken bearing from inside the transmission, and wanted $1000 just to look into the problem more, they also said that broken barring was probably contributing to my gas problem as well. I just wanted to know if there a temporary way to at least to stop my gas from leaking until I can fix this? Please help!