fuel pump is bad, the code shows you that, along with the fact that you are running lean. stop driving it and replace that fuel pump. as far as antifreeze you might have a leaking radiator. i remember something about the 3.8 about a weird antifreeze leak, where it pools up somewhere on the engine and burns off.
I am assuming this is the 3.8 litre V6 im sure all the APV vans had those. i highly doubt the engine is shot, you just done have the fuel to run, and the car is missing and backfiring because of that.