Yes, any MS user is capable of it.
Only full blooded Uchiha's can do it.
No, only certain MS users can.
And i still stand by my statement, only Madara was and still is capable of controlling a Bijuu.
But the kyubi was inside naruto all along. How was itachi supposed to control it if naruto was already though so?
Madara had an excuse, he had an angry army ready to recieve a royal beatdown, he was too pre occupied, and even then he still found the time to try and summon his loyal beast.