For those who are familiar with RSS, just look to the RSS icon at the bottom of the relevant frontpage or news item page or at the end of your address bar in your Browser.
If you are new to RSS;
1) What is RSS? have a look at Wikipedia
2) You need a RSS reader. The latest releases of Browsers usually have inbuilt RSS or live bookmarks so first check your Browser for this function. Or do a Google to find some alternate software. Another option is to covert the RSS feed to an email service using a RSS forwarding service like RSSFWD by copying the RSS feed address for your desired part of the TM News site and pasting it in that forwarding service setup page.
You may also like to look at the guide at TeachMeJoomla.