I was going to start a new thread but the title of this one fits perfectly!

I'm going to buy a new laptop soon but was wondering how i go about using my itunes account on the new one? Is all my purchased stuff stored online or on the laptop itself? Ie if i download itunes to the new laptop and log in to my account, will everything still be there? Obviously my music will need to be tranfered either from my old laptop or iphone but it's the other stuff i'm bothered about.
Sorry if it sounds dumb but posting on here is about the extent of my computer skills! :embarassed: