1995 Honda Accord Hello Just Bought And Broke Down 2 Days Later Check Engine

Hello, I just bought a 1995 Honda Accord & it broke down not 2 days later. The check engine light was on so we checked it with the computer and it showed an oxygen sensor problem. We were able to drive it a few miles the next day and it just broke down on the freeway. We tried to restart it and it did but only went a few mph before shutting off again. It eventually stopped starting all together. We have checked the timing and spark and it is ok. My husband said it's like it isn't getting gas. Any suggestions of where to start (easiest and cheapest way?) Thank you