How do you go about opening an insurance company?

Unfortunately the topic of how to open an insurance company is well outside of what can be properly explored on WikiAnswers. The procedure would vary depending on what type of company one seeks to open. The easiest-to-open insurance-related business would be a local insurance agency. At one of these agencies, employees sell insurance policies to local consumers but don't themselves underwrite the policies. In most cases, being an insurance agent is a state-licensed profession; you would need to check with your state's license-issuing body to understand what the requirements are. Generally this would involve obtaining training in the field and then passing a government test to demonstrate competence. After being licensed, you would need to find an insurance company (such as State Farm) for whom you can affiliate yourself in selling insurance. After this you could file paperwork to open the business, rent an office, buy equipment, hire employees, advertise, and do similar things.