how do i transfer my i tune songs from my old i phone thats doesnt have service to my new i phone?

Sync them from your iTunes library. If your music isn't in your iTunes library, purchased music can be transferred by connecting your phone to iTunes, then going to File>Devices>Transfer Purchases. Music from other sources can either be imported to iTunes from their original source (e.g., your CDs) or transferred from your phone using 3rd party software such as Touch Copy (windows and Mac) or PhoneView (Mac only).

Or you could go on to itunes and go under quick link and pick purchased then download all songs fom the icloud. do this on your computer and then sync your new iphone to your computer and you will have all your music