Yes, and no. He died after he finished training Obito Uchiha - he disconnected himself from the statue of the outer path, which was keeping him alive.
Kabuto revived him later on using Edo Tensei. So he's in a sort of unlife at the moment, not truly alive.
No, Madara Uchiha is the leader of the Uchiha Clan. Obito is merely a member and he is dead.
Tobi is Madara Uchiha in Tobi's form!! Obito Uchiha is dead and completely unrelated besides the fact that he is an Uchiha too.
Madara Uchiha was never the first Hokage... Hashirama Senju was the first hokage. Madara Uchiha is really dead though, and was revived by Kabuto using Orochimaru's technique.
Sasuke Uchiha, Tobi AKA Obito Uchiha, Madara Uchiha, Shisui Uchiha, Kakashi Hatake, Danzo and Itachi Uchiha.
No. Madara Uchiha is dead but will be revived in the world war by a forbidden jutsu. Tobi (the guy with the orange mask) is not Madara. It is Obito Uchiha. Check out Naruto manga 590-608.
No, Madara does not die.... at all. Madara (aka Tobi) is immortal, so therefore he does not die. ;)
His true name is Madara Uchiha. This name was forgotten by many after Hashirama Senju defeated Madara Uchiha at Valley of the End.
Because he doesn't feel like it.
Sasuke Uchiha and Madara Uchiha
It seems the person everyone believed was Madara Uchiha, is a fake, as the real Madara Uchiha's dead body was in Kabuto's possession, and he has been revived by the Impure World Resurrection technique.
Uchiha Madara is a really strong shinobi from the Uchiha clan. Not the guy with the orange mask. The guy with the mask says he is Madara but he is Uchiha Obito. Madara awakened the rinengan and that is why he didn't die early. Obito would have been dead but Madara found him and saved him. Then Madara entrusted his plans to create a better world to Obito and died. Check out naruto manga 599-608
Madara is by far the strongest. If Itachi was stronger he would've killed madara himself.