As for targeting, just imagine it like you press a button and the closest "non-friendly" (creature or player) is highlighted in red.
I've played games like that. this isn't that type of game. if you can't aim or track, then you can't kill stuff.
for right now there's no mounted combat either. there's always a possibility, later in the games' life that it's added.
i know you want it but it isn't happening right now.