Car won't start. Help Please!!!

[LaunchHard]

The grounds could be an issue. I'll have to make sure i go over them. Where are the major ones, besides the battery ground?

I have tried giving it gas while turning it over, but makes no difference. It tries to run, but as soon as i let off the key it putters and backfires off. It's ran for maybe all of five seconds at a time. It has the esentials, but won't stay running.