Just bought a late-2008 aluminum MacBook to act as an educational tool to learn OSX before I plop down the coin for a MBP. I have two totally newbie questions...please bear with me. 1. The previous owner didn't wipe the computer. I want to create a new admin account for me with new password, etc. How do I do that? 2. I have no restore discs. Can I still wipe the machine? 3. I want to upgrade to Mountain Lion, since I believe this machine supports it. How do I obtain & load the OS? Thank you for your patience. I feel like I'm learning a new language!