Hey Laura,
Yes, all you need to run WooCommerce tickets is WooCommerce itself and The Events Calendar, both of which are totally free.
You do not need Events Calendar PRO at all โ think of it as just another add-on to The Events Calendar “core” (the free version), just a bunch of extra features that are “nice-to-haves” but are not essential or required for running any other add-ons.
I hope this information helps โย let us know if you have any other follow-up questions, comments, concerns, etc. ๐
Cheers!
George