Using multiple accounts at once

Hey, i couldnt find anything about that topic in the rules, so assume it is allowed, but i want to clarify, so i dont get in trouble:

1. Is it allowed, to have more than one account?
2. Is it allowed, to play on more than one account at the same time?
3. Is it allowed to send items / gold from one account to another?
4. Is it allowed to boost a character on a 2nd account, e.g. playing on your mage main account and boosting a character on your second account in a dungeon using that mage?

Ty in advance! Sorry, in case i could have validated those questions by researching more / better.

1. There's no limit to how many accounts you can have.
2. Yes. There's only a limit of playing 5 at a time in world/BG's. You can still do 25 man multibox raids, but you'd have to ferry them 5 by 5.
3. Perfectly fine.
4. Yes, done this plenty of myself. Do note that boosting without party in world by tagging skulled mobs isn't allowed. E.g. lvl 40 tagging a 50+ mobs and then killing them with your 80 isn't allowed.

actually i just want to play my alt while waiting for queue or something on my main, also i might consider boosting my alts in dungeon so iam fine i guess! TY!!