iPad security and memory

unlike my transformer i don't use or even know of any security apps for the ipad and yes 13gb is normal for the littlest ipad

 

As already said, yes it's normal. The OS has to take up some room.

If you like to keep passwords with you and a little bit more, 1Password is a great purchase. It can store passwords, log in credentials and even information like Drivers License info. All under password lock. You can set a password to open the app and a separate password to see information (passwords, CC info, notes, etc). As far as security apps for safeguarding the iPad, you're out of luck. The only option you can really resort to is "Find my iPad" from iCloud.com or from your iPhone/iPod.