These sources will give you a general background about your country and its broad social and political environment to help you frame the rest of your research. Many will also give you general statistics and directory information about government officials. Be sure to check the publishing dates to be sure you are getting the information you need.
Scroll to the bottom and choose the "Reports" link to find the annual National Trade Estimates of Foreign Trade Barriers. Not every country is covered, and countries covered vary from year to year. Look at several years to see if your country is covered. Also check out the information on Free Trade Agreements.