you're totally mixing a few stuff... let me go over those things one by one.

A. there's no comparison between Ino's mind control jutsu and the mangekyou sharingan (tsukiyomi), even if you think that Sakura has some extraordinary power (which she doesn't), it still won't do her any good against Itachi... becuase Itachi will simply not care, Sakura can bitch about everything she wants, Itachi simply won't care and will stab her to death.

B. Naruto won't probably go all 'super kyubi' again, I think his body is getting used to the demon's chackra, so he keeps his mind and limits his power (see the diffrence between the haku fight, the fight with orochimaru and the fight with neji, there a increase\decrease rate between Chackra outburst\sanity).

C. Naruto won't stand the mangakyou sharingan, unless he's completly out of control (goku's Ouzaro form ouf of control), Itachi's power will own him.

D. Gaara is a diffrenet case, since the sand demon has direct effect on his brain, so he might have a slight resistence to the sharingan.

E. Kyubi and Shukaku (true forms) won't be touched by the mangakyou sharingan, i doubt that they even feel the stabbing of some lame sword from a pipesqueek like Itachi, it just won't bother them.