1993 Pontiac Grand Am vehicle sitting over 1 year and stayi

When driving all the dash instrument lights would come on and then the engine would turn off. After letting it sit a bit, it would restart and go a mile or two and same thing would happen again.

also, if we can get it up and running. It has been sitting for about a year and a half. What maintenance does it need before starting it up? I'm guessing the fuel must be like lacquer and I'm sure the oil needs to be changed. What else does is required after such a long period of sitting?