You can make the titles of the content items linkable by setting the page where they are published when creating or editing the feed in Sitefinity backend. Look at this page: http://www.sitefinity.com/documentation/user-guide/creating-and-uploading-content/creating-and-editing-feeds/creating-a-feed.aspx
, "Content to include
"Select the page where the content is published, by clicking Select a page
The page needs to have the correct widget if you want your content items to be shown on it. That means if your RSS lists news items, than the page needs to have a news widget.
By default the PublicationDate of the content items is included in the RSS xml. It depends on your RSS reader if it is displayed or not.
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