1. Yes

2. Yes

3. Yes, he could login as a guest with his account info

4. hmm you it looks like you did some homework, good. Macros are strings of commands you set for easy later use. for example instead of select something, then select magic, and select what magic you want to use, you just press one of your set macro buttons and the spell will automatically be cast. for example if you wanted to cast cure on yourself you would put this in as a macro: '/ma "Cure" <me>' there are so many possibilities so I can't really explain it all here, but the macros you want to use really depend on what job you pick. Don't worry though, it's something you'll learn as you go through the game. As for length, there is a limit of like 7 lines of text or soemthing, but don't worry about that, most of my macros don't go beyond 3

5. skill chains. well to be honest, as a paladin I haven't really had to use them much but basically when you hit or get hit by an enemy you earn TP. after a certain amount of tp has been gained (usually 100) you can use a weapon skill. there are several ws for each type of weapon in the game, and they all have an element. if you attack with one ws and then another person in your party attacks with a ws compatible with yours within a short time, then afterwards a new attack will happen and do additional damage to the enemy, and that's what a skill chain is. as for magic bursts I'm not sure, I've never leveled up an offensive magic job, but I *think* that's just like a skill chain except instead of ws, ws, it's ws, ws, and then shortly after a mage uses a compatible magic for even greater damage. I know it rpobably soudns difficult but parties usually decide on the skill chain(s) they are going to use early on in the party.

6. probably, I mean you could always get lucky and end up on the same world but chances are you'd need a pass