What kind of business insurance do I need?

• business car insurance
• business health insurance
• business liability insurance
• insurance for cars
• cars insurance rates
• formation agent
• registered agent service

I am looking to pursue a business opportunity where I will be picking up my customers' cars from their houses and will be driving them locally on the street, and then returning them (not chauffeuring them). I am obviously insured to drive my own vehicles through my own personal insurance, but what kind of insurance should I look for to cover my business endeavor?

What kind of business insurance do I need?