Which component do I need for what use case?
See Set up UBIK® for details about use case dependent installations.
Where can I find some logging information and configure its destination?
Read the article about configure logging to get to know the destinations of log files and how to modify them.
Can I connect to my own web service from within UBIK®?
Yes, of course. You have to configure the according bindings and endpoints as desribed in Configuring Services Using Configuration Files.