Answer: to put an end to the wars that would take place in Amegakure and bring peace.
When Yahiko was younger, he noted that he disliked the fact that it always rained in his country as if all the country did was weep, and he wanted to change that. This may be where the name of the organisation literally meaning "daybreak" comes from. He also noted that the organisation was meant to act as a support unit for Nagato, whom he believed would bring peace to the world.
From Quiz: For Avid "Naruto" Fans
Answer: Kakashi
Kakashi was four hours late to pick them up from the academy after they were told he was the jounin in charge of them.
From Quiz: "Naruto" #1
Answer: Konohamaru
Ebisu is Konohamaru's teacher and later sensei.
Inari is the grandson of Team 7's client in the next arc.
Ranamru is the name of the child Naruto meets in a filler arc later on in the anime.
From Quiz: Naruto [1]
Answer: Hashirama Senju
Tobirama is the second. Hiruzen is the third. Minato is the fourth.
From Quiz: The Ultimate Impossible "Naruto" Quiz
Answer: They were childhood friends and rivals.
They were both in Team Minato, along with Rin Nohara. Tobi, or to use his real name Obito, and Kakashi's relationship draws heavy parallels to Naruto's and Sasuke's.
Sakumo committed suicide after botching a mission in order to protect his fellow ninja, going against the ninja code.
Tobi tried to steal Naruto as a baby, in order to get the Nine-Tails. He is the same age as Kakashi (almost).
Kakashi has a Sharigan, not a Rinnegan.
From Quiz: Naruto: Shippuden
Answer: Sasuke
Sasauke was the only one who had acknowledged Naruto and understood the loneliness he felt.
From Quiz: "Naruto" Shippuden
Answer: Kabuto Yakushi
Kabuto quit the preliminaries saying that he is injured, but he actually was afraid to reveal his true abilities and blow his cover.
From Quiz: "Naruto" Chunin Exam
Answer: The Second Hokage
The jutsu was later discovered by Orochimaru and later again by Kabuto.
From Quiz: "Naruto" Anime
Answer: Itachi killed them off, leaving only himself and his brother, Sasuke, alive
Itachi Uchiha killed them all off. They say that Itachi killed them to see the limits of his powers. Kimimaro's clan, the Kaguya clan, went on the suicide mission, and all but Kimimaro were killed. Orochimaru's attack with his snakes actually happened right on the Hidden Leaf Village, while the Third Hokage was still alive.
From Quiz: What Do You Know About "Naruto"?
Answer: Souryuu Tensakaii
Ten-Ten uses a rain of steel known as Souryuu Tensakaii.
From Quiz: The "Naruto" Series