Generally with cameras, use as little lubricant as possible. A problem area should be identified and confirmed to be sticky before applying lubricant to anything. I sort of doubt that there is grease on the parts of a Bronica film counter - you may find grease in large moving objects like focus helicals, but not in tiny geared sections.
A PDF copy of the service manual for Bronica S2 / C with exploded diagrams is available on learncamerarepair.com. It also has a section with suggestions for the cause of some common problems. Look at it carefully.
You can save the backing paper from a roll of 120 film and use it to practice loading the camera and advancing. That way you can practice loading and run off a lot of tests of the frame counter without wasting any film.