I hope so I would hate to loose all my buddy's even though at the current state it seems like its defentily gonna happen1. Hopefully that resolves your issues. Even with ammonia locked up, it is good to get nitrite (and nitrate, if there are any) down. Nitrite needs to reach very high levels to kill marine fish, but it's still better to keep it low if possible. Plus, would probs help with not inhibiting nitrification.
2. I agree with @laverda, looks pretty 'new' to me, but anyways we can move past that, whatever is the case right now it is not processing ammonia well enough, presuming your ammonia read was correct.
3. That should be plenty, so long term you should be fine.
4. That's okay, it's not always easy to know the 'best' method, and to be fair people do do fish-in cycling. I have done it before too. It just needs a bit more finesse.
it very well could have been i really didnt know what to ask and the guy wasnt very helpful i got more info from the guy i bought the setup from and he sold me the whole setup for 120 bucks had a feeling i would have problems or need to replace some of the stuff im only about $250 all in including all my buddys at this point so if i can get through this ill feel lucky thanks for all the help