Alt Text for images and Title text for links

In an effort to make our site more accessible, we are scanning our site using an online tool and we are getting accessibility errors thrown for all of our images which we have uploaded because they do not have 'ALT' tags and our 'Read More' or 'More' links are also throwing accessibility errors because they do not have 'Title' text associated with them.

Where can we go to resolve these two issues?