You just throw some pictures there. Let me explain what i think is happening at those pics. The part where Tobi said the Sharingan's true powers, my powers, Uchiha Madara's powers is a key phrase imho. When someone is talking at the third person there are two occassions. One he is talking about someone else and two he is a psycho that has pretty high self esteem and is referring to himself. Madara is the exact opposite of a phycho. He knew exactly what he was doing, he wasnt driven by insanity or anything similar. The other pics that Itachi says to Sasuke that there is another Sharingan user and pinpoints him as Uchiha Madara have some flaws or Kishi intentionally did this to fool us thinking Tobi IS actually Uchiha Madara. When Itachi killed his clan he talked to Sasuke about another person with the Mangekyou Sharingan. That further fooled us believing that Tobi is for sure Uchiha Madara. There are two explanations about this. A) Itachi met the real Madara before he died (although this doesnt fit the time that the actual Madara gave Nagato the Rinnegan) and B) Tobi is really and Uchiha and show Itachi his MS. Either those two OR Kishimoto changed in the meantime and switched Tobi's identity to another person and as a result we are trying to collect pieces that doesnt fit together. Last but not least i think that Tobi is a non-Uchiha, a Zetsu-type clone.Zetsu can copy a person down to his chakra, so that may explain why Itachi thought that Tobi is Uchiha Madara.
Yeap this is Uchiha Izuna his little brother.
He didnt kill him. Izuna died at the battlefield with honor while fighting blindly.
According to Tobi. Izuna willingly gave his eyes to Madara in order to help him guide his clan further.According to Itachi. Madara ripped out Izuna's eyes to regain his sight and continue his plans. (although this is unlikely in my opinion cause imagine a blind guy and another one with the MS sharingan. how the heck can u lose ur eyes to a blind man and while u possess such power? Only if he caught him off guard.)
According to Tobi....according to Tobi the Kyuubi attach on Konoha was a natural disaster (Tobi states this to Sasuke in the same conversation that he speaks about Izuna); but later we see the account that Tobi summoned the Kyuubi to Konoha.
He was lying then, and I believe the whole account with Izuna is a lie as well.
Madara and Izuna were twins. It is possible the body we see in the coffin is Madara after his Rinnegan has been removed.
I agree with you again when you say "how the heck can you lose ur eyes to a blind man and while u pssess usch power?" Logically, Izuna voluntarily gave his eyes to Madara in order to obtain power. These two obviously planned everything out together. The two could read the Sacred Uchiha Tablet, they knew the secrets.
Madara could have easly implanted a new sharingan into Izuna. It would make sense that he return power to his younger brother who he cared for. The Sharingan that Kakashi and Tobi have is always activated (supporting that Tobi's Sharingan is also borrowed) but being an Uchiha, Tobi can use the Dimensional Mangekyo to its fullest extent while Kakashi requires preparation and suffers side effects (which supports that Tobi is an Uchiha child).
Naruto 562 Page 2. We see a flashback from when Oonoki is younger. He and Muu are speaking to Madara about Hashirama. If Madara was alive with Oonoki and Oonoki is alive and old now. Izuna could be alive and old as well.
I just think that Tobi is a lying sack of shit! (yes i said it) he lied to Sasuke about some details about the Uchiha past just to make everyone believe he was Madara. He is not powerful enough as just Izuna, no one knows Izuna, but
Madara Uchiha-Power in a Name blah blah blah. I am so over this guy and I cant wait till he gets OWNED by someone.