The only thing you can do with those frames on the master is to place text in them.
This is not Quark where those frames would be live.
As bob says, this isn't Quark where you can just click to type in a master frame, but you CAN Cmd + Shift + Click to override the master frame and then type in it. You might be better off, though, with a presized and styled frame saved in a library that you can drag onto the page and position. My feeling on master frames that get overridden is they most likely shouldn't be on the master page at all.
A common reason for not seeing master items on document pages after applying the master to the document page is because the items have been placed on the left master page in a facing-page document, and the document page you are looking at is the first page, which is a right page.
Also, make sure all layers are visible, View>Extras>Show Frame Edges is on, and you are in Normal screen mode (View> Screen Mode). Here Show Frame Edges is off and one of the layers is hidden:
With Show Edges on in Normal view mode the MP items show on the pages with dotted outlines
To release and convert an MP item to an editable page item you have to Command-Shift click the MP item. A page item has a solid outline:
Thanks Peter, Command/Shift/Clicking seems to do the job!
Couldn't figure out why the graphics frames were showing up but not the text frames.