Try these link they are old but they show you how to add meta description, keywords and title in blogger blogs http://www.danielmillions.com/2007/03/blogger-meta-tags.html http://forums.digitalpoint.com/showthread.php?t=330021 by arpitagarwal82 hope that helps.
The URL to danielmillions.com is one of my websites and I have an updated code at http://www.gurucreation.com/2008/05/blogger-meta-tags.html for blogger blogs.