How do you sync iPhone contacts to iTunes?
"Once you plug into iTunes, there should be a folder on the top
that list: Music, photos.... one option is contacts."
There is no such folder in the top list, but click on your
iPhone in iTunes and go to the Tab called Info. There you can
select services like Gmail, Windows Contacts etc. to sync your
iPhone contacts. Be careful, this will sync in two directions.
Therefore make sure not to delete existing contacts, but to merge
contact information on your iPhone. If you simply want to copy your
contacts from your iPhone to the PC (into iTunes is not possible)
you may use a backup software or app, allowing you to export
contacts.