Isn't Contoso is the name of the sample database? it will be running on either MS SQL server 2008 or 2012, you need to ask your administrator for that information if you don't know it.
here's a video about installing the driver Install data access drivers: SAP Lumira 1.12 - YouTube
You need to get the source file from the database vendor, SAP doesn't provide it.
regards,
H