2000 Ford Taurus car wont start but more detail

The taurus theft light blinks every 2 seconds the headlights are the only electrical that works, meaning no radio doesn't try to crank no locks windows. I have keyless entry but that doesnt work either even after replacing the battery. I changed the battery terminal because it was corroded. Now nice and tight just like you guys said before but still nothing. I tried to touch the starter wire and the battery terminal to like hotwire the car but it cranked but no spark and no fuel. Got a new key but cant program it because to do so the lights on the dash have to come on for the process to work. I'm kind of running out of ideas. I'm trying to see if theres anything you guys can tell me to do without me having to take it to ford because I got the car so cheap I can just make my money back and wipe my hands clean of it. Any thoughts?Also I would donate but times are hard and christmas is coming but in the future if I need assistance anytime after the holidays I will contribute