To create a business page on Facebook for consumers to "like" you must first have a personal account. It is your choice whether you utilize your personal profile but this has to be created first before creating a business page.
WHY? In social networking, you are first a person "Hi, I am Joan. I have interests, friends, hobbies, etc." and second, I am business woman who runs all my business related content and interaction through a Facebook Page. To be successful in running a company Page you need to understand how social networking works in the first place so you can use it the best of your ability.
You can choose to not use your personal profile much but you will need it to get started. Consider using your personal profile just so you can learn how your consumers use Facebook. The more you use it both personally and professionally, you will be more successful.