Each treasure have a different super rare counters. Kage is about 1000, Tendo is about 400 and Jin, Hidden cloud, edo is about 200. In terms of kage. it's a 50% of getting either 4th raikage OR susuanoo sasuke. It's not a guaranteed to get either one of them for your first time pulling a super rare. You can sasuke or raikage for your first super rare pull. Once you do, the counter resets. If you decide to go for the second time, you can end up getting the other super rare or getting the same super rare you got in the first pull but it won't be the full 80 frags.

No, hitting 1000 rolls just unlocks the two superares in the sense that they go in the common rares pulls so, if you are lucky, you can get ay at 1020 and sasuke susano'o at 1080. Used to be as resilience said before 3.0