Hi Jan.
Thanks for your questions.
I will answer your first question — about hiding free events from month calendar — but each separate question will require creating a separate forum ticket. I hope you understand this helps us keep things on track to best serve you.
So, to answer your first question, I created this plugin for you: http://cl.ly/1y1G2N2j0x1F
Download, install, and activate it.
It will add ‘tribe-event-free’ CSS class to free events and ‘tribe-event-paid’ to non-free events.
You can then target these events via CSS.
For your specific request, you can add this custom CSS to your site:
.tribe-events-month .tribe-event-free {
display: none;
}
Please let me know how this works for you.