Well when his brother Itachi killed there parents,Sasuke wanted to kill Itachi for payback so to get strong he suddenly got the desire of evilness and strength which Orochimoru has......Besides Orochimaru wanted sasuke's body but in shippuden sasuke gets powerful and kills Orochimaru.
To save Sasuke
Orochimaru brought the 4 Hokages back to life to give Sasuke the answers he wants.
Orochimaru
In a sense Orochimaru did not kill the 3rd. The 3rd used a jutsu to make Orochimaru not be able to use his arms anymore and then he died in the process of it. So no Orochimaru did not kill the 3rd.
After Sasuke battled Itachi, it was said by Madara Uchiha, AKA Tobi, that Itachi died on purpose. Madara stated that Itachi wanted to battle Sasuke to finally give him what he wanted. During the battle, Sasuke managed to go up against all of Itachi's Mangekyo Sharingan techniques and stay safe. Towards the end of the battle, Itachi starts to reach out to Sasuke to get his eyes so he could have the Eternal Mangekyo Sharingan to keep from going blind. Itachi used his ultimate jutsu, Susanoo and blocked all of Sasuke's attacks, even though it came with the cost of killing him. When Sasuke was backed into a wall, Itachi simply tapped Sasuke on the forehead and said, "Sorry Sasuke, there won't be a next time" and dropped to the ground. While waking up, he finds Madara and when he sees Madara's Sharingan, Sasuke immediately uses Amaterasu, unlocking his Mangekyo Sharingan.
orochimaru wanted to be in sasuke's body because he saw that sasuke had great power, but sasuke took advantage of the fact that orochimaru was weak and decided to fight him. sasuke defeated him and ran away to go look for itachi and kill him......
Sasuke Uchiha has the 'Sharingan' ability, an asset that Orochimaru would find very useful. Also, Sasuke is a very powerful Ninja, already adept at Taijutsu, Genjutsu and Ninjutsu. Orochimaru has already managed to put a curse upon Sasuke, which lends Sasuke a portion of Orochimaru's power at certain points. Orochimaru believes that by lending him such power, Sasuke will hunt for more, eventually leading him to find Orochimaru. Another reason is that Orochimaru eventually wants to take over Sasuke's Body because he is so powerfull. once Sasuke kills Itachi, Orochimaru Plans to inhabit Sasuke's soul.
When Orochimaru was transforming, Sasuke enters the room and tried to kill him. Orochimaru is in Sasuke, but Sasuke took over Orchimaru so Sasuke has full control of his own body. During Itachi's final battle, Itachi finds that Orochimaru is still alive in Sasuke, so Itachi drove Orochimaru out and kills him. Part of Orochimaru is in Kabuto after Sasuke and Orochimaru's fight, so Orochimaru might not be dead, but Orochimaru is mainly killed by Sasuke. The answers you find here are all found from the manga we read.
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.
no, but orochimaru does.......
sasuke is ashamed that naruto is getting stronger then him and the Orochimaru, Itachi thing "Because Sasuke wants to train with Orochimaru to become stronger and seek revenge on Itachi Uchiha."
yup sasuke marries sakura (sasuke kills orochimaru) and naruto marries hinata
he didn't Sasuke killed Orochimaru himself ,well sort of.
Yes, Naruto eventually convinces Sasuke to leave Orochimaru and return to the village. Sasuke ultimately breaks free from Orochimaru's control and seeks to redeem himself for his past actions.
Orchimaru
Sasuke is using Orochimaru to get stronger to take revenge on his brother itachi. Later Sasuke ends up killing Orochimaru and its because Sasuke thinks he can kill itachi alone without being Orochimaru's Container (host). So he never had any feelings for Orochimaru at all.
Warning spoiler: Orochimaru dies from sasuke uchiha