Was driving my 2003 Chevy Trailblazer on mass.

Sir I am having the problem as someone had as follows:

Was driving my 2003 chevy trailblazer on mass pike the other day. Oil pressure dropped to zero, check gauge light came on so we pulled over. Checked oil, was low, added two quarts. Got back in truck, started her up and everything was normal. Began to drive again and a few hundred feet down the road the same thing happened. Got out checked oil, was where it was when we added to it, nothing was leaking. Went to restart the truck and nothing. It would not turn over. No metal in the oil. Truck just wont turn over. Hoping for some help, very limited budget, dont have money to take to a shop. And with family medical conditions I need to get this fixed asap. Any and all help with be greatly appreciated.

Electrician says that the batty is okay. So my engine is seized now or what?