It is always best to first review the Company's website!
How to Create a Demographic Profile
How to use Composer & Crosstab 2.0
The best market research is a combination of primary and secondary information.
Primary information: research you compile yourself or hire someone to gather for you.
Secondary information: This type of research is already compiled and organized for you. Examples of secondary information include reports and studies by government agencies, trade associations or other businesses within your industry.(source)
The resources available to you at the library will primarily help you with secondary research.