This guide will take you through the whole process of adding calculations (and everything else):

http://technet.microsoft.com/en-us/library/ms170208.aspx

You have nothing but IDs in your Measure Group and no actual measures.

In order to get some meaningful information you need to re-evaluate the model of your cube. Something as simple as a count of records in your fact table and then linking it to the dimensions to provide context would be a start. Until you have done this you won't even be able to start thinking about MDX calculations.

Go through the tutorial I linked to and you'll get a better idea of how a useful cube is structured.