Vision database question

 Can someone help me understand the vision database setups and configuration that it comes with.   I have installed the e-business suite with vision database and when I run the oracle apps I see Vision corporation, so many operating units, inventory organization, some existing po's , invoice etc etc.

Is there a documentation that explains what setups vision database come with?

Is there any report that I can run and see at least the organization/inventory org setups?

What are the accounts(CCID) being used? how many buyers are already defined etc.