how do I copy my itunes music from my macbook pro to my new iphone ?

ENable music syncing in iTunes, then go read the manual and lean about the other basic functions of the device.

Connect the iPhone to your computer, open iTunes. Look for your phone under Devises. Select it. In the right side display select the content you want to sync from the tabs, then click on the Sync button. Also:

Please get iPhone User Guide - iOS 6.pdf.