Assuming you mean to be picked up by the search engines, there's a yes or no option in the settings...
Go to Edit HTML. Tick Expand Widget Templates, search for nofollow by using Ctrl F, then delete all rel='nofollow'
thanks Lumhierre but thats lot of work.. can i not download full blogger template with no follow already removed and do follow allowed so that i can post that into template section of blogspot..
Actually, it is not a lot of work. It's just as easy as 1, 2, 3.... And if you cannot do such simple step then there's no place for you in the blogging world...