From your other post I'm going to guess your an Aussie guy and looking to board. Firstly it would help to know your age (you can pm me that).
A. Best East Coast prep schools(ranked & tiered in MY OPINION)
Upper Canada College
*I'm sure there are other good boarding schools but in MY OPINION these are the best.
B. Firstly we are much more modest then Americans the closest thing we have to the East Coast itis is that Toronto is the center of the universe. The only school that can quite compare is St.George's school which I know would fall in that first tier(brothers school).
C. These links will help start you in the right path and answer those questions. Ontario Boarding Schools Canadian Boarding Schools & Residential Schools
Lastly I must stress something to you. Do not choose a school because it is "elite", choose the school that is the best fit. Hope this helps. If anybody has anymore questions please ask.