Like Veej, I'm still somewhat confused as to Why No-One had told Naruto Any Of This beforehand. The whole "Hiruzen told everyone to keep it secret" is BS at this point in the story, specifically when hes dead and no-longer Hokage. Naruto had the Right to know who his parents were & the intimate details of his heritage - Kakashi, Jiraiya & Tsunade in particular FAILED, being that they Had to have known the specifics.
What was the big deal? 5 minutes to tell him (3) key points.
Hey Naruto, your father was the 4th Hokage.
Hey Naruto, your mother was the 2nd Jinchuriki for the Kyubi.
Hey Naruto, you're closely related to the Senju.