1)have the password included, whether to auto populate or not
I don't remember anything with passwords being tied to bookmarks. The wand feature though with auto-fill in the fields on the page though so you could just click the login/signin button though.
For something in a bookmark, you'd have to use username:password@ to submit in plain text for sites that supported logging in that way. That's no longer supported for security reasons though.
However, if you use the LastPass extension to manage your passwords, it can autofill the login fields on the page and can also automatically log you in (for some sites, depending on how they do their forms).