What is a Professional Corporation?

I would like to start a family corporation and transfer properties that we own into the corporation name. We have a rental property and some others that are currently vacant. Should I include my primary residence, timeshares vehicles, utilities and services, into the corporate name? Does it matter if I have a mortgage on any or still making payments? What can help me most if I have low credit scoring? Which would be more suitable if I expect to engage in multiple business pursutes. The main officers will be me and my wife, and may expand to include my children. Right now our business is rental properties and property management but we would like to include a greeting card business and soon a product that is being developed for market. We're looking to do this in PA VQUSE