Codes P1235 and P0460

I have the car listed above zx4 se. I started having problems with it. My dash lights acted erratically, the engine sputtered when moving, there was a clicking underneath the hood when I turned off the engine and when I jiggled the ground wires it would stop clicking, the radio would reset to am every time turned on the car, the time would also reset. I took it to a mechanic and told them I thought I thought my problems were my stemming from my engine ground and the car would also give an error code of p1235 dealing with my fuel pump driver module. The mechanic did their diagnosis and recommended I replace fuel pump along with my fuel pump driver module. So I bought a fuel pump and FPDM and installed them, but the funky problems persisted. Also my fuel gauge stopped working. I read somewhere that the code p1235 could also be cause by bad engine ground. Then I noticed that my engine ground wire as well as all the wires coming off the negative post were all exposed. The rubber casings corroded off. So a friend and I cut and spliced the wires and taped them up and VOILA my dash lights all worked again as well as the radio. The clicking stopped as well. Car ran fine for a week and then stalled out on me. It wouldn't fully restart. It turned over and then would sputter and stall. This time I got some new codes(yay) p0460 dealing with the fuel gauge not working and p0191 my fuel rail pressure sensor. Luckily some good Samaritan helped me get my car home but I'm at a loss. Should I replace my fuel rail pressure sensor? Will that even fix my car not starting problem? Surely, the not starting issue has nothing to do with my fuel gauge not working, I just filled up yesterday. Not to mention I pay my car off next week. I'm at a loss. Please help of you can thanks!