Bail bond agents can carry firearms (like regular citizens) and make arrests in California. However, they do not have the same power as police officers to investigate crimes, enforce traffic laws, or cordon off specific areas.
No - if you signed the bond it doesn't matter whether you have a job or not - or whether the bondsman asked you if you did. You are liable as surety on the bond - having a job or not has nothing to do with your liability. Sorry.
Anyone can post your bail bond. Usually you will go through a bail bondsman so you put up a small percentage of the bail, but you forfeit that once the bond a returned. To qualify you need to have credit and collateral. If your bail bond is $100K ...
Bailing someone out of jail who has a history of untrustworthy behavior can create headaches. You're essentially agreeing to put up 10 percent of a bail bond that could be tens of thousands — or even hundreds of thousands — of dollars. If they fail to show, then you went to all that extra trouble for nothing.