Contact your local health dept. They will get you started in the right direction as far as any licenses that you might need.
In regards to pricing, the general rule of thumb is 3 times your costs. In other words if it costs you $1.50 to produce a pulled pork sandwich then you turn around and sell it for $4.50. You can adjust your prices from there. Equipment is going to be a thorn in your side during the beginning. You will be amazed at all of the little things that you need, but don't have.
I'm sure it is a requirement in OH, shop around for insurance quotes. I would think to expect around $500-700/yr easily.