Ballyhouras

Depends on your legs, you can do em all in a day, but it would take 4 to 6 hours depending on how fit you are. Its a stacked loop, so the green is just an extension of the white is just an extension of the green and the red is just an extension of the white etc.
Yep, it covers just about everything worth doing. Its long though, very long, you'll have nearly lost the will to live by the end of it.
Mel and I did the long one down there in around three hours at a not too fast pace. 4-5 hours if your reasonably fit should be grand. It really is a sweet set of trails.

Make sure you take some € for the coffee afterwards :)