As Snow Leopard wasn't released until August 28, 2009, you must use the white Snow Leopard retail disc with the image of a Snow Leopard as shown on this tip, and it does not say Upgrade, Dropin, or OEM, or a Mac model on if you are going to use it on the MacBook. Note: That installer disc only contains iTunes and no other components of iLife. For iLife, you must find the original 10.5 installer disc that came with the machine, or a retail physical copy of iLife, or update the machine to 10.6.6 and buy iLife from the App Store. iLife from the App Store does not contain iDVD.
The installer once booted will give you Utilities you can use from the installer menus, includingDisk Utility to format and partition (see bottom of tip to determine which Disk Utility instructions pertain to you) the hard drive HFS+ GUID (this erases the drive). If you need Boot Camp, request help from this forum.
Upgrading to 10.7 or later, be aware Rosetta no longer exists, andwhat that means.