The first Iron Man comic was 'Tales of Suspense #39'. This comic laid the foundation for Iron Man's popularity and his subsequent appearances in various comic series and story arcs.
The movie Iron Man 1 takes inspiration from various Iron Man comic storylines within the Marvel universe. It combines elements from multiple issues to create a compelling cinematic narrative.
Sure, Iron Man has retired in comics. It might be because he's exhausted, wants to focus on other aspects of his life, or there's a major event that prompts his decision. But comic storylines are dynamic, and he can always return when needed.
Well, Comic Iron Man's strength varies depending on the version and storyline. Sometimes he's got really powerful suits and weapons that make him a force to be reckoned with. Other times, he faces challenges that test his limits, but he always finds a way to come out on top through his ingenuity and resources.