pay to play?

[Moonwraith]

You can switch your classes, into any available class (the 3 basic classes are always available, the Expert Types have to be unlocked server-side and have class level requirements) and level them up seperately but you will only get the benefits of your current class (I don't know if this is how FFXI works, I have never played it).

You can't level up Hunter, switch to Force and expect to have a bucketload of HP. But if you switch back to Hunter, your old stat gains and Hunter level will still be there, just as you left it.