Do I need 2 users or something else?

I just replaced an old mac with new macbook.

My wife uses her work mac for personal stuff, so we want to import her personal stuff to the new one.

Not sure if we need 2 users/multiple libraries or what.

Here's what we need:

• Merge and share our 2 existing iPhoto libraries.
• Keep 2 separate iTunes accounts (for separate ipads, etc.)
• Ability to share movies in iTunes to avoid duplication.

We don't need separate preferences, bookmarks, etc.

How would you proceed? Is all this possible?

Thanks!