You cannot kill an immortal and Kyuubi is immortal. Who knows how old he is. I'd consider him "undead." Maybe to get his amazing, and extremely deadly powers he had to halfway die. I don't know. His origins and future are shrouded in mystery.
he will die as the kyuubi will take over him completely
Well I'm going out on a limb here but if Naruto dies and Sasuke destroys the leaf village I'm pretty sure, Naruto will no longer be alive and the leaf village will be destroyed
Kyuubi is Japanese word. 'Kyu' means 9 in Japanese. So Kyuubi is 9 tailed
the kyuubi is the nine tailed demon fox yodaime sealed within Naruto.
Not necessarily "useless", but he is less powerful without Kyuubi.
Probably not. The Uzumaki clan had great stamina and chakra levels even without being jinchuuriki. When Kyuubi was freed from Kushina after she gave birth to Naruto, she was still alive, which Madara praised her for. Madara broke the seal and freed Kyuubi, only to force him to attack Konoha, using his Mangekyou Sharingan.
No. Kyuubi strongly resents the fact that the Yondaime managed to seal him.
Chapter 299 was the first time Naruto went kyuubi.
Kurama
Almost everybody
Kyuubi
Um...O.o No. Kyuubi is the title of the bijuu sealed inside of Naruto. Naruto's mother was Uzumaki Kushina.