First off, I would take the car in and have it put up on a lift to determine the fuel leak.
Chances are you have a brittle, leaky fuel hose, or one of the crush seal fittings are leaking at the fuel pump area.
I would have the fuel filter replaced and all the crush seals at the fuel pump area replaced along with (any) brittle fuel hoses.
If you just try to tighten one of the fittings, chances are other will start to leak as well, and this is a job you really do not want to do yourself on the ground because it is messy and could catch fire real quickly without having it on a lift with the battery disconnected, and the right lines pinched off to perform the job.
Also the lines that you have to pinch off usually crack during the process and need replaced as a result.
It's a messy job no matter how it's done, and I always tie rags around my wrists when doing it because the fuel runs down your arms and arm pits and burn pretty bad on those sensitive skin areas.
So doing it on the ground could turn into a real hornets nest.

Let the tech see how it runs after that and then check your other issues if they still exist, but you want that fuel leak fixed like now.

You may be able to free your trunk button by shooting some P/B blaster or something into the lock assembly, but it's hard to fix it without seeing it.