Yes, Lelouch does die in the manga.
I'm not sure. You might have to read the manga yourself to find out for sure.
As for whether Lelouch is dead or not, I won't spoil the story here. After all, this is the essence of the novel, and the readers need to experience it themselves. As for whether Rebellious Lelouch will have a third season, according to what I know, there is no definite news at the moment. However, if you like this work, you can also take a look at the author's other works. For example, his second work, Roar of the Robotic Lion, is also a very exciting novel. I hope you like my recommendation. Muah ~
No, Levi doesn't die in the manga. His fate is different from what some might expect.
Kaeya doesn't die. The manga continues with him as an active and present character. His storyline progresses without such a fatal event.
No, Inosuke doesn't die in the manga. The story keeps him alive throughout.
No, she doesn't. The story doesn't have her dying.
Nami doesn't die. The manga keeps her as a significant and surviving character with ongoing plot developments and adventures.
Sure, Dio meets his end in the manga. His demise is a significant plot point and has a major impact on the story's development.
Bulma survives in the manga. Her presence is significant and she remains an integral part of the plot. The story doesn't have her dying.