Review the college website. Most colleges prominently post a list of degrees offered. Click on the link to the degree in which you are interested to be directed to that department's site. There you should find a description with degree requirements. Also, most departments will post a "request more information" link at the bottom of the page that will offer details on whom to contact if you wish to request further information. If the main website doesn't have the information you're seeking, contact the college admissions office.
Call the department directly. Ask to speak with someone who can answer your questions, and request that you be mailed or emailed any additional information you need.
Visit the department, if you live close enough to do so or will be traveling nearby. Schedule an appointment to meet with a professor from your desired program. By personally meeting with a faculty member from the department, you will get a better feel for the atmosphere of that department, and a better understanding of the professors' expectations.