Blazer will not start?

I ran out of gas last week and when I put gas in it, it still wouldn't start. So, I replaced the starter because all it was doing was making a whining noise. And now it tries to start but it won't turn over. I put plugs wires and a starter in it. I just changed the oil and put a new oil filter in it. Tries to start now but won't turn over I think it needs a distributor which I have I just haven't put in the fuel pump sounds like it's running but I don't know why it won't start. I've been told distributor, fuel pump, battery, the relay switch or that it possibly jumped timing. I don't know where to start.