I need to know how much it would cost a month for insurance for my pitbull?

pet insurance - Google Search (http://www.google.com/search?rlz=1C1CHNB_enUS336US336&sourceid=chrome&ie=UTF-8&q=pet+insurance)
Best to get quotes from a few companies, compare policies, then choose the one you feel is best. And that's for any insurance.

Only State farm agent can give you a rate to add your dogs to your home owners policy. You will have to have one. It is very possible they may not include them, many insurance companies will not write policies that include certain breeds