He gets killed by Sasuke but he does it on purpose because he loves Sasuke, and he wanted to give him his sharigan, but Sasuke didn't know :-(.
Actually Sasuke doesn't kill him at all (At the end Sasuke is back up against the wall and can't attack against Itachi cause of Sushano'o and he could have taken his eyes to gain eternal Mangekyo and become immortal and, save himself from sickness he had. (At the last fight he almost got heart attack and took medicine to longer his life) And that sickness + own use of a Mangekyo + restrain of his body (Giving Sasuke his Mangekyo was the last thing his body could take.) My guess is that its briefer to Madara Uchiha who in almost the same situation took his baby brothers eyes and gain getaway from his cruel fate by killing his brother but Itachi chose to die himself.
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Itachi Uchiha part of the Uchiha clan also a member of the akatsuki
yes his brother's name is Uchiha Sasuke and Sasuke's brother's name is Uchiha Itachi == ==
No.
SPOILER WARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!----------------------------------------------------------------------------------------------------------Itachi Uchiha killed Orochimaru. Some say that Sasuke Uchiha killed him, but technically, he didn't. Sasuke only consumed/took over Orochimaru. Then, in the battle between Sasuke and Itachi, Orochimaru came out of Sasuke, then Itachi killed him. Then, Sasuke Uchiha killed Itachi Uchiha
The Konoha Council and Danzo were the ones who told Itachi to kill the Uchiha clan.