Can anyone help me underdtand the tools of data exchange between wo seperate systems with the same configurations?

You need to study Chapter 15. Data Exchange Mechanisms of the Developer Guide

In a few words you need to understand
XML documents read and write tools
XML-serialization
Exchange plans

Also you might want to have a look at LoadDataXML82.epf data processor in ext directory which comes with Hello 1C master class: This data processor allows to import XML data and also conatins Unloading form item group which is invisible by default (to make it simpler due to it's a master class) for data export.

For data exchange mechanism sample see Data Exchange demo application and for more complicated examples see 1C:Small Business application.