Using the Amtrak website and searching for info on the Austin station
http://www.amtrak.com/servlet/Conten...earch_code.y=9 , it says check-in with service (i.e. checked bags) 60 minutes.
From that same page, there is a link to the Texas Eagle that then links to the National Cafe Car Menu
http://www.amtrak.com/servlet/BlobSe...afe_201101.pdf .
That's not to say any of these items could change, but it is what Amtrak has published.