When Sasuke fought Danzo, his three-tomoe Sharingan could use Izanagi. You need the Mangekyo Sharingan to use Izanagi BUT his Senju DNA allowed him to perform the ability using the regular Sharigan.
Incorrect. You do not need Mangekyo Sharingan to use Izanagi or Izanami. They are baseline Uchiha abilities that have their own cost when used. It doesn't matter if you have normal sharingan, MS, EMS, or Rinnegan. The cost of using Izanagi or Izanami will always be the same - you lose sight in that eye.
On top of that, you don't need Senju DNA to use either Izanagi or Izanami. Having Senju DNA only enhances the abilities, it does not enable them. With Tobi, Senju DNA allowed him to activate Izanagi for much longer than a minute. With Danzou, Senju DNA allowed him to implant 10 Sharingan in his arm as well as use Shisui's MS ability more often than once every 10 years.
I'm also pretty sure that Senju DNA also increased the duration of each Izanagi activation for Danzou as well (I think baseline the ability only lasts for a few moments, not a full minute).
The same is for Tobi. He has Senju DNA inside of him, and it allows him to use the Mangekyo Sharigan without actually ACTIVATING it.
This is incorrect as well. Mangekyo Sharingan is required to use specific abilities, but having Senju DNA would not make it so he can activate it without activating it. That doesn't make any sense. Senju DNA would make any abilitiy he used with MS, more powerful.
Kakashi will never have self transportations or be able to slip threw object, unless he get Obito other eye that Tobi have. Just like Tobi will never be able to transport object or people to the other dimension without touching them, unless he get Kakashi left eye(why don't your understand this). Kakashi have already master Kamui in his left MS eye, I mean when you can make just the rasangan disappear in Naruto hand from a far with perfect precision and had someone like Tobi totally fake out, I will have to say you might have Kamui down in limited time and try's compare to Tobi(Kakashi just need more chakra so he don't have to ration Kamui). Only thing left if he have not done it already or even can do it with his left MS eye, is to look at object or people and make them slip pass other object or people.
It doesn't matter which eye each one of them have. Which eye doesn't decide which abilities the person can use. MS unlocks specific abilities, and the eye which activates an ability is no different than which had a person uses to activate an ability. It's the same difference as being left handed or right handed. It's no different than Kakashi using Raikiri with his right hand and Sasuke using Chidori with his left hand. They are the exact same ability and each ninja calls it something different and can manipulate it in different ways.
The same goes for Ameterasu, Tsukuyomi (yeah, Tobi knows Tsukuyomi too), Susanoo, and Kamui. The only thing that is constant between all these different people using all these techniques is that they have their own style and capabilities with the technique.
So while Kakashi has been using Kamui this while time, there is absolutely zero reason why Tobi couldn't use the same technique if he wanted to, unless he just hasn't figured out how to use it yet.
Also, space time techniques are not limited ONLY to Sharingan users. Minato was not a sharingan user and he used space time techs, same goes with Tobirama Senju. So while MS sharingan can potentially activate space time techniques, it is not required. Very little is known about Izuna, and heavy speculation and evidence points to Tobi being Izuna. The fact that Tobi can use space/time techniques as well as he can signifies that he was capable of using them long before he acquired Obito's eye.
i predict that he is izuna kagami ( and father of obito perhaps) or some random new char and if so i predict reactions similar to when amon turned out to be a new char that didin't eppear in the previous seris. if you want someone who did the bad thing that we saw ebfore the bad guy papered watch scooby doo
Everything you've said up until your prediction is accurate and correct, kudos for taking the time to list those facts. However, there is no such person as Izuna Kagami. They are two different people and Izuna is Madara's brother. Kagami was a student of Tobirama Senju and a peer of Danzou. Izuna fits the personality of Tobi and is the most likely candidate for being Tobi because of his ties to Madara.
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