(1) FormMaker does not include a scripting console. The assumed workflow is that you develop all the scripts for your forms in Acrobat. When everything is working and ready, you can then copy the script into your form field in InDesign using FormMaker. FormMaker does have several text-edit areas for each form field in the document where you can paste the scripts you have written.
(2) Reflow: It would be possible to script this in Acrobat, yes, but again, it depends on your scripting skill.