How to sync a iPhone 5 on a Mac?

I just bought a iPhone 5 and went to synch on our Mac computer. My husband synced his earlier and walked me thru the steps he took which were successful but when I plug mine in it keeps saying that its his iPhone plugged in and not mine. I don't want to sync mine when it thinks its his because I don't want all his contacts, ect. What to do?

I would call apple I don't know how to do it besides maybe using Bluetooth to sync it.apple's number is 1-800-myapple and say I need help syncing my iPhone to my laptop.