Target of target/Focus target:
No. You'll need to watch the field and see where trouble is coming from.
Somewhat. If you're playing with other people you'll need to rely on them ctrl-clicking certain things like hexes to announce them in team chat. There are also other clues than the ones you've pointed out, like the Blind condition causing a black cloud to appear in the affected persons face. Once you get heroes, you can open a panel for them like you can with the pet. For henchmen, foes and non-party members you won't have any UI to show you this info and will have to rely on other means.