HELP Please! Car won't start and shows 3 codes
 

Ok, I posted previously but am hoping I'll get more help and alot quicker qith this post.

I have a 92 SC400 that was running, then just stalled and was hard to start. Now it won't start at all. The check engine light throws three codes:
14 - Ignition Signal
15 - Ignition Signal
78 - Fuel Pump Control

I was told earlier to check out my ignitor because it might've gone. I replaced both of them with a friends that I know works. Then I checked out my plugs and they were GONE, so I replaced those. Now all it does is crank/ turns but never enough to start the car.

Please post any/all ideas!