I enabled the TCP\IP and named pipe services.

Then I changed the owner of all ServerAgent Jobs to SA and IT WORKED.

Thank you very much for all your help.

SQL Agent is running.

Are all the replication agents running? -> I do not know. Which services do need to run and where do I find it?

Replication monitor: See attachments. Does...

This brings me a Table with 3 Rows. Publisher_dba is always 'Repla', the subscriber is twice 'virtual' (ID -1 + -2) and the third time Replb with ID 1

I made exactly and all which is written in the Stairways Level 1 (http://www.sqlservercentral.com/articles/Stairway+Series/72274/). I got no error message, all was successful as it is written and shown...