how do you sync music with itunes to your ipod touch 4?

You should really read the manual.

open itunes, connect ipod, select what you want, sync

where do you click sync? i dont know how to do it on itunes 10....

Hannah you are not the only one having sync issues. I can't get either my 4th or 6th gen IPOD touches to sync with my mac mini with ITunes 11.4 software. My Ipod nanos and classic have no problems.