TCD is very highly ranked anywhere. But it is not like American colleges in that there aren't any of those fraternities or sororities, but there are college clubs, and yes there are dorms, but there's a very long waiting list for them, and many students simply seek accommodation in surrounding areas.
Non-EU nationals have to pay full fees unless they get funding from somewhere, and I'm not sure about the scholarship situation, but here in Ireland you get in on academic merit, not sporting prowess.
To get into TCD go to www.cao.ie and start reading about how to apply to university in Ireland from abroad. You'd also better get studying - as more young people are going into education, the competition to get into places like TCD is getting fierce.