tell u this Tobi is madara uchichi. that is who is the mask he was a one who fought the first hokage he never appers tell sasori dies
He reveals it to Sasuke after Itachi dies. After Sasuke kills Itachi, Madara tells Sasuke about Itachi's hidden life. He also tells Sasuke who he is- Uchiha Madara! This is in Episode 140- fate.
In episode 396.
It has not been revealed in the Naruto manga or anime if Madara Uchiha dies.
By using information from the manga in the Confining the Jinjurkey Arc Konan battles Madara Uchiha after Kisame Hoshigaki dies which is currently taking place in in Naruto Shippuden 250 so this is only a Estimation Konan will battle Madara Uchiha in episode 251-252
It mentions on one episode but there is no clear episode where madara comes out in ......... sorry
Shippuden 248
not out yet
It is not proven that they are the same person.
Its naruto shippuden episode 139.
164
Shippuden 136