Mary, if you're looking for some insight from someone who has been there, I think I know where you can find it.
There's a man who resides in Durham - BullCityRising is his handle - who used to post on these forums quite regularly & who also has a blog that is all about Durham. A while back he decided to take Durham's public transport for a week just to see how easy/hard it was. Here are some links to his blog entries.
Bull City Rising: Bull City Riding: Day #1 (http://www.bullcityrising.com/2007/07/bull-city-ridin.html - broken link)
Bull City Rising: Bull City Riding: Day #2 (http://www.bullcityrising.com/2007/07/bull-city-rid-1.html - broken link)
Bull City Rising: Bull City Riding: Day #3 (http://www.bullcityrising.com/2007/07/bull-city-rid-2.html - broken link)
Bull City Rising: Bull City Riding: The wrap-up (http://www.bullcityrising.com/2007/07/bull-city-rid-3.html - broken link)
As for housing, I suggest you contact the graduate school and see if they have any recommendations. I hear that Duke's graduate program does a regular survey of apartments in the area in order to help new students find the best place for them. Hopefully NCCU has a similar program.
Good luck!