1. In the Visual Basic Editor, click on Tools and then click on Options.
2. Check Require Variable Declaration.
Note: Option Explicit will not be added automatically to existing Excel files. Simply type in Option Explicit yourself if you want to use it.
Question two should have its own post as it will not show in any search as it is buried in a non related question so anyone searching for this answer will not find it.
Step by step instructions (for 2007):
Office orb
Excel options
Trust Centre
Trust Centre Settings...
Uncheck Remove personal information from file properties on save