From L'Hotel Nina,Tswen Wan to Mongkok by bus or MTR?

Thanks a lot.
Q1 From L'Hotel Nina,Tswen Wan , the transport is easily to go to Mongkok is bus or MTR?
Q2 If from ferry terminal Hong Kong and back to hotel, I take the cab,how much ?expensive
or not?
Q3 What is weather on 11 sept to 15 sept 2010.
thank you very much.