Hello Chanael, thanks for your interest in Lunarpages! Hope to see you joining up with us soon.
I think it is pretty easy to use the CoffeeCup tools to create a web site - but as far as how easy, that might depend on the kind of web site you would like to make.
With exporting data to other methods, this would depend on the content gathering method that you would use. Could you give us an example if you could of what you would like to create and I am sure our forum members here would be more than happy to give you some suggestions.
Also yes, with the Basic and Business plans you get the ability to host up to 10 addon domains for free - but that does not count the cost for registering the domain names. Hope that helps and if you have any other question please feel free to shoot them our way.