Configuring SSIS,SSRS, and SQL Server - three server model
What you are asking about is broad architecture rather than specific issues. I dont believe there will be a single document that gives you a step by step guide. 

If your vendor is making this reccomendation you could ask them to explain thier design with at least some basic documentation and diagrams that help you understand the layout.

If you are unfamiliar with either of these products you have a big learning curve ahead of you. MSDN is probably the best place to start. If you have specific issues then you should google those.

Assuming your main database is already running, i would start by installing an instance for SSRS. Then work through designing and deploying a report that connects to your source db. 

Then repeat for SSIS. Set up the server and design and deploy a basic package.

A key part of learning about both SSRS &amp; SSIS is learning about datasources,  connection managers and connection strings. 

If you are unfamiliar with these concepts and your company is expecting you to install configure and develop with these products they might be expecting too much of you and I suggest that you ask for assistance.