How do I sync with new itunes

Same way as before. To show the sidebar (where Devies are) go to iTunes>View and click on Showe Sidebar.

OK, I did this but it's not finding my iTouch 1st gen. Any solutions?

Here:

iOS: Device not recognized in iTunes for Windows

or

iPhone, iPad, iPod touch: Device not recognized in iTunes for Mac OS X

Well its easy! Jus go to itunes
>click on the arrow with a box on top left corner
>select show MENU BAR
>click on VIEW
>select SHOW SIDE BAR

Jus like previous itunes the sync options will appear wen u click devices..

Hope this helps..🙂