You have to make up your own presentation - aimed at the appropriate level. So if you want to aim it at intermediate two then your presentaion content should reflect this level.
I do not know what the written exam is about - prob about the course of study that you have applied to do. I have a few friends who did the PGCE last year and they were told to bring a dictionary with them - but that was for English. It was a panel interview - two local heads and a local teacher plus the Moray house staff. They do put you at ease, prob. ? I hope so as I am worried as I only want to study in edinburgh and not any of the other Scottish uni's that I put down.