It say on the Runescape site how to become a member.
RuneScape subscription is when you suscribe and you become a member.
no
No
They are a non-member/ free player.
Godswords are member only items.
You can't.
no
No.
no
Currently, it's 82 member worlds in all of RuneScape, whereas 5 is in other languages.
Go to the RuneScape website and click the button that says "Click Here to Play". When you get to the RuneScape client, at the top of the screen (underneath the stupid advertisement), it says "Upgrade to Member". Click on that. :) You do have to pay monthly to be a member.