An LLC or a Corp would be your best bet for general protection. However, without any assets or history, you aren't going to get much credit without signing personally, so that they get to take your house if you don't pay them back.
Meet with a local attorney to get that setup.
LLC.
Check out www.legalzoom.com for details.
I plan on selling food in Illinois, I want the business so that if it goes under it isn't tied to my personal assets. What kind of business is this how do i go about becoming one and how much does it cost?