Good Afternoon everyone,

I recently came back to the game. I'm not max level yet or anything. I felt like a rogue RIN would be a fun pick to level and PvP.
Anyways last night I took some time setting up my UI. Removing error messages during combat and rolling text to make my screen more clean.
But I wanted to know a few more things about the game.
Is there PvP gear obtained through PvP only?
Addons?
Cast abilities at focus target?
Any sort of special macros. Mouse over and what not if it does exist.
I've also seen some PvP videos where melee characters have it so their player is always facing at their target and locked. Is that really the best way and advantage to get all damage off?
I think that's about all my questions. Anything else you feel like adding to let me know please do. And thank you
Also I noticed my character has the option to edit the character and change it? Is that like a 1 time ever thing or how does that work? Does it just appear every so often.