Michael Ferrante's post in this thread has a list of useful documents
For your server configuration you should be looking for the Windows 64 bit version of Weblogic Server and Forms.
> My questions is what will be the basic minimum set up to make that happen?
The system requirement guide in the link above will have all the information you need
> Can we also install the WLS with Forms and Reports on the same server that the database is on
Yes, assuming your server meets the combined requirements for both products, although I prefer to keep them separated for ease of administration.
> ..then only install Forms and Reports client part on user workstations?
For Forms 11g there is no installation required on the client to run forms applications (other than JRE). However if the user workstations will be used to run the forms builder and reports builder used to create the forms and reports modules, you will need to install Weblogic and Forms (Developer install type) on each workstation.
One note of caution: Forms 11g is extremely sensitive to the versions of the components - Weblogic Server, Forms, Java, Internet Explorer, etc. I would use only the versions certified in the certification matrix in the link above.