Whether they extradite or not will be determined by the specific office policy. Typically states/counties do extradite on felony warrants. The cost is passed on to the defendant if convicted as part of court costs. Some police will have access to warrants, others will not. Depends on the system that is in place in their car, county, etc. Have you browsed through the information in LawInfo's Free Legal Resource Center to learn more about your issue yet? See:
http://www.lawinfo.com/consumer.html. You can certainly try to speak to a lawyer to determine what legal options may be available. In the meantime, you may be able to learn more on your own. Search the "Free Legal Resources" tab, or browse the Consumer Resources. Good luck.