Make sure that you start with reading the ReadMe.txt File.
Install Instructions.:
The following is the documentation for installing the AX-OData Query Utility.: Install Guide
How-To.:
The following is the documentation for making use of the AX-OData Query Utility.: How To Use Guide
Further, the following link is a very good write up that also explains the use of OData Feeds for Microsoft Dynamics AX 2012.: MSDN Blog - OData Query Service