Moved to InDesign forum.
What are you doing when this happens? What type of Mac is this?
You may have a corrupt font (which would explain the crashing).
When you launch InDesign, hold down Command Option and Shift (immediately) to delete the Preferences. That may fix some of your issues.
To Check for Damaged Fonts
I've also gotten crumbs stuck in my touchpad or something on the sensor of my mouse (dust, etc. which can cause random scrolling), check both and let us know.