As the title says, I've never seen a Naruto episode, nor do i know anything about it. However i saw this game and it looked really fun and like something i would enjoy. Will i be completely lost if i haven't seen the show?
You'd probably like the battles. But if you have zero interest in the show, you should still buy it, but skip every cutscene. Really, you should do that. Some of them are half an hour long, and the characters only blabber about stuff that's relevant to the show and it's not even told very well. If you stick around and watch the cutscenes, You'll be bored with it after a few days.