The quick answer is NO, you can't bend back the fork. Or at least not at a reasonable price.
Your bike looks right knackered. You could maybe find a used fork off a donor bike for free or cheap at a bike coop - but you might put said fork on and find your frame is bent.
I'd say your bike is what we kindly refer to as a said "donor bike." It's brain dead and its best use is to give up its vital organs to a bike that might be able to use them. Given that it looks BSO quality, the parts aren't that valuable but if your next bike is a BSO, you might want a spare drive set, seat, brakes, or rear wheel.