You will loose your apps and music when you try to sync. Your calendar, contacts and notes will be okay and you should setup with iCloud anyways.
To prevent this you need to transfer your iTunes library to your new laptop. The iTunes library with all the settings/config files inside the iTunes folder are linked to your phone. Transfer that to the new laptop and you shouldn't have a problem syncing.
Do you have a windows or mac? If Mac are you planning are transferring your entire user from the old computer? Or restore/upgrade from a time machine backup? Both are easy as pie and you won't loose a thing, apple ftw!!!
Posted via RS Mobile