i've just opened a domain uses adsense for domains .. it should be ready within 48 hours ! my question is if i need to upload staff and write things in it or google will everything and i just need to advertise this page ...
No, no, no! Adsense for Domains is for domains that are parked without any content. If it's a brand new domain without any traffic already, you are unlikely to make much money. If you want a site with content, you have to use Adsense for Content.
You don't have to put anything in the page. Google will do everything for you. All you have to do is just to set it up. I think it is against Adsense TOS to advertise any domain participating in AFD, isn't it?
Adsense for domains create a parking page just like namedrive parking page. It is good for domain which are getting traffic. Else it will not help you. Then better create a content site and add adsense.