A) dunno, a bus i guess but that is not very helpful
B) they are about every 30 mins during the daay. if i remember rightly, the y stop running at about 8pm. my personal favourite way to get from ibiza to den'bossa
C) depends on your taste. the sunset strip is popular but a bit crowded, the music rocks though. if you want drums not djs go to benniras a bit further up the coast, beaautiful