He wanted Tsunade to fix his arms. However, she betrayed him, so his arms never got fixed. Instead he took over a new body. That's how his arms are alright now. This happens in the end of naruto, a few episodes before the time skip to shippuden. Orochimaru intended to take over Sasuke's body, but Sasuke arrived too late. He takes over another body instead.
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He remains who he was, just without arms
To kill the Third Hokage. He did kill him, but then his arms were useless until Kabuto healed him. !- NarutoFan2000
Hmm... how should I answer this question? Simply put, Orochimaru was not killed by Itachi, but by Sasuke. Sasuke killed Orochimaru in Orochimaru's weakest condition, knowing that Orochimaru had no more power to grant him.
Technically Orochimaru forced him to use the reaper justu or whatever tis called so Sarutobi took his arms spiritually and the reaper ate them alon with Sarutobi's life. He also died from the minimum of wounds he had from fighting Orochimaru too. Everyone cherrished him after he died it was sad. Konohamonaru was comfurted by Naruto.
Orochimaru killed the 3rd b'coz he wnted revenge for not letting him b'cum hokage and instead making minat namikaze the 4th hokage.........and he also wanted to make konoha weak for the invasion.....................