My boyfriend is being charged with robbery in concert, how much time could he get?

A life plus term is definitely a possibility

What's legal ground for DA or judge to grant such an immunity for a plaintiff ( witness) who himself commits misdemeanor

As described, the only reason coming to mind is the DA really wants the alleged perp.

If someone possibly has a warrant for not appearing in court from a DUI,

It "could", yes. However, misdemeanor DUI warrants are not high priority at the terminal.

Can I ask for compensation for my children and I being exposed to someone else's blood that wasn't cleaned up at checkout stand?

Your problem is going to be proving compensable damages. Maybe consult with a PI attorney.

I just got my background check results for a job my criminal record was clean but my motor vehicle record I had

If you have to drive on the job, obviously. Consult counsel about dealing with the DMV.

I was strip search made to squat cough why when I was only detained

Who knows why? There are not enough facts present to answer. Why were you detained?

If a warrant was signed in 2011 and you got it in 2014 can that be dismissed

Yes, it can be dismissed. Talk to counsel about it

In CA possession charges dismissed after class program. How to get arrest and police report records removed?

No can do but the diversion and dismissal sure did not hurt anything.

Might have tested positive for drug testing by PO for DUI? what can happen?

You could get a probation violation. Speak with counsel.

Probably not. The DMV is a separate entity partially independent of the penal code provisions.