1. Also Shorin ryu
2. Yup. Sunday is the day for sparring, but it is interwoven into the other days depending on who is teaching and who is learning.
3. As I'm assuming we're talking about free sparring here, the level of contact is set by the lower belt. I don't mind some contact to my chest, but I'd be less than thrilled if I was hit that hard in the head. Usually, the only protection is a cup. I think the key words to remember are "mutual respect."