World passes

When you get a world pass to go to another world, how does that work exactly? Can you take a level x char from your world to the next or do you have to get a world pass and then make a new char on that server? I'm thinking about transferring to Midgardsormr or Diabolos.

Also, a random off topic question - is it possible to allow someone else to enter your mog house? Like if you just want to show it to them or something? Or can you only go into your own mog house and there's no way for them to give you permission to enter theirs?
thanks

you would have to get someone from the server you want to go to too buy you a world pass, then you would have to start a new character on that world

as for question 2, you can only go into your own mog house