ok first you go to account and select privacy settings and go to the bottom of the page and on the left you should see something that says apps and websites read it and click edit that is hylighted...
Click on the tab that you want deleted. There will be a pencil looking thing next to the tab name. Click on it, then click delete tab. The wall, info, photos, and boxes tab can't be deleted. You can...
To delete your facebook account you have to go to account settings and click account and then somewhere theres a close account thingy and you click that type in the reason and yup!!! But i wouldn't...