No-one actually knows, hence the big secret and speculation about his identity, or apparence.
Masashi Kishimoto (Naruto's Mangaka) hinted at the idea that Madara was supposedly using Obito's body, although this hasn't been proved yet in either the Manga, or the anime series.
Madara's previous/past apparence however has been confirmed and shown in both the manga and the series during a flashback in his explanation to the Leaf-Village's plight and Itachi's betrayal, where we saw him with long black.
In short, we won't know for sure, what Madara looks like at present, until someone actually removes his swirlly mask.
Chat with our AI personalities
He had at least five brothers. Four were killed in battle, when Madara was still a child. He also had a younger brother, Izuna Uchiha.
The author never revealed if Madara Uchiha married anyone.
There is no "Last Survivor of the Uchiha Clan", but there are "Last Survivors of the Uchiha Clan" whom are Madara Uchiha and Sasuke Uchiha. Although the "Last Survivor of the Uchiha Clan" is most likely to be Madara after Sasuke dies since Madara will live eternally, according to fan predictions. Madara,Sasuke and Itachi.....now only Sasuke,but the other 2 are also revived by edo tensei
No, Madara does not die.... at all. Madara (aka Tobi) is immortal, so therefore he does not die. ;)
Madara Uchiha is a man.