What can i do if the police made a deal with me and didnt respect their part?

As my colleague has explained a police deal not in writing and without the DA's approval is worthless. Hire a lawyer.

What are the current laws on using prior strikes on conviction?

This is a very large question, too much so to answer in a short post. The worse that can happen, depending on your history is that your sentence...

Can i talk to DA and resolve my case without an attorney at prelim

You should never speak to the DA or the police about your case even if you have a plausible defense. You should retain a lawyer to do it for you.

Found out my friend has a warrant. It says the charge is PC3455(B)(2)

It means he has violated terms of his release most likely by failing to maake an appearance. There is a range of sanctions that could be imposed,...

How long will an infraction (VC 23136 a) stayvon my record? And will I have trouble getting a government job?

Forever. Seriously. It should not impact your getting a job.

30 days is the maximum time the seeking state has to pick him up. That decision often depends on the seriousness of the charge. If he's not...

245 (a) has 4 distinct subsections with different consequences. Why don't you ask his lawyer?

If criminal charges are dropped can they be filed again

I agree with both answers but would add that if you were charged with a felony the case can be refiled once w/i the statute of limitations.

In addition to my colleague's excellent answer, if the PH was continued beyond 60 days of the arraignment your friend had to agree to that. Just...

When do the detectives reach out to the victims?

This is not a speeding ticket questions. Nor is it a true criminal defense question as you are the victim. The cops will get around to you. Relax.