Leaking gas?

Awhile back someone stole the catalytic converter from my vehicle listed above. Because I didn't have too much of a choice, I still drove my vehicle around for a while. I then put a straight pipe in place of the catalytic converter. It made it quieter but then out of nowhere one day I started to drive and ran out of gas. I didn't think too much about it, I just put gas in, then went to the gas station and put more in a total of $3000. Did what I needed to go do wasn't too far and ran out of gas again. I took it home and parked it when I went under the vehicle, I noticed oil all over the straight pipe I used to replace the catalytic converter. And while driving I could smell gas bad; I thought it was because the gas can but even without the gas can the smell of gas Is bad. I had a friend look at it and he said there was about two quarts of oil too much and gas was spraying out the parts where the straight pipe was clamped on (in place of the missing catalytic converter). He took out the spark plugs and cleaned them off also he fixed the clamps on the pipe for me, but it is still leaking gas. Not as bad but enough to not be able to drive. I need help please!