questions about my yaris(vitz)

[apples]

ok i imported my vitz from japan, and the owner's manual is in japanese. It's the vitz 2005 model (yaris 2006)
Now since the owner's manual is in japanese there 2 things i can't understand.
1. my yaris is an automatic. It's gear sequence goes like this. first reverse (R) then neutral (N) then drive (D). It's fine till here. but after that i don't understand. Towards the right of (D) is an (S). What is this S? What does it do? How do you operate it?
Then after (S), if you move the stick down there's a (B). What's the (B)? What does it do? I tried driving in B, but the car went slowly and made a lot of noise. Is it for mountains?
What's the S?

2. What's teh thing on the inside of teh car roof. i know there's the door lights, but other than that there's a button with a fan drawn on it. What is this? What does it do? How do you operate it?

Thanks a lot.