1999 Ford Taurus new parts in 99 Taurus and car wont start

My car was having trouble starting and then would not start at all. Replaced the ignition sensor didn't work changed the ignition coil, still didnt't start. Replaced the starter, still didnot start. I turn the key and you can hear the startter turning, but it wouldnt fire up. Tested the spark in the coil by pulling plug #1 and put a screw driver in it. Turned the key no spark, turned the key a second time got spark and it started right up. Drove the car around and parked it. Car wouldn't start, not even with the screw driver. I need your help, I am a fater taking care of three and the only one working any good advise with little to no cost is best as my pockets are already thin. And parts seem to keep needing to be replaced and it doesn't work

Thank you all