Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
1. No.
2. Yes.

Btw, MRoogle would have answered you this question a dozen times.

Page 37 or so of the User Guide of your Mac will tell you how to replace the HDD.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.