He's hiding his identity because he wants people to believe he is the real Madara Uchiha, so he's hiding his real face under a mask.
Madara Uchiha.
Sasuke Uchiha and Madara Uchiha
Madara is by far the strongest. If Itachi was stronger he would've killed madara himself.
Madaras true identity is hes an Uchiha like Sasuke and Itachi hes their cousin
No
No, Madara Uchiha is the leader of the Uchiha Clan. Obito is merely a member and he is dead.
It has not been revealed in the Naruto manga or anime if Madara Uchiha dies.
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.
Uchiha Madara was a highly skilled ninja who lived years previously. He helped lead the Uchiha clan and was one of the founders of Konoha. He also trained Itachi. Madara helped Itachi with the Uchiha Clan Massacre.
No
The author never revealed if Madara Uchiha married anyone.
Tobi is definitely the leader but h is real identity is still another mystery. He can be Uchiha Madara or Obito,