I'm confused.
Since Tobi is Obito, which Uchiha attacked Konoha with the Kyuubi?
Obito would have still been a teenager when that attack happened and Madara is confined to his cave if he isn't dead yet.
Can anyone explain this?
It was still Obito.
To further support my point, Obito's age at the time of the Third Shinobi War was 13 (as stated in the databooks). We can imply that Kakashi was 13 or 14 at that time as well.
Kakashi's current age is 30.
Naruto's current age is 16.
The Kyuubi's attack on Konoha occurred on Naruto's birthday, so it can be implied that Kakashi was 14 or 15 at the time (30 - 16 = 14).
Therefore, Obito's age was 14 or 15 at the time he battled Minato.
Yeah, it makes sense that he was pretty inexperienced and had to flee from battle after one Rasengan hit. But what I'm more concerned about, is the fact that he has been able to spam Kamui/Jikkukan Ido for 16 years, and was able to see quite well for that amount of time with just his MS. Itachi had pretty much lost his eyesight after 8 years with the MS. But I guess we can add that as another hax thing one can do with Hashirama's DNA.