Help with iPod and new Mac please!

I know there's a lot of old posts about this but none of them exactly match up to my query and I really need to double check this, apologies. I have the latest 80gb vid iPod and was using it with my work macbook pro and had my itunes library set up and the iPod synched. That computer died and I have now purchased my own macbook and want to get the music from the iPod to the computer. The iPod was set to automatically synch with the last computer. The new computer has iTunes on it and whilst many previous posts have said that because it is a new computer for this iPod it will ask me whether I want to synch before automatically doing it, to which I say no, but I am worried because in the setup wizard for the macbook it asked me my apple ID etc which I provided and so I am worried that it will automatically work with my ipod. Does anyone know if this is the case? Many thanks for any assistance on what to do.

 

Thank you so much iDuck. I'm still confused about how using something like this prevents itunes from opening and instantly wiping my ipod seeing as I set it to automatically synch. But thanks!