If this site is from the training class, it may be the page which is not designed to be editable in Sitecore. I know that some of the instructions will involve creating components from this page and then afterwards you are able to edit the page successfully in Sitecore. Unfortunately the part you commented out (i.e. @html.sitecore.field()) are the parts which make the page editable in Sitecore. I wish I could take a closer look at your environment, I bet I would be able to figure out what is going on, I used to teach the class.