Question about the ESF

I just got the admission letter for the ESF Tsing Yi kindergarten
May I ask:
1/ what program is ESF school offer for the student in primary or secondary session? Is it IB program?
2/ How is its Chinese or Pontonghua level?
3/ How easy is its kindergarten student got admission to its primary session? Any interview needed?
4/ If my child finish the kind in Tsing Yi, How can I arrange the primary school? Can I apply Both Sha Tin Junior school and RC at the same time?
Many thanks