I have this so far which is not working http://nimb.ws/TGAEP5

most likely due to being new to odoo

If you are looking to make a field invisible based on a check box, you can do it with the help attributes , attrs="{'invisible': [('check_box_field', '=', False)]}"

If you are looking to make the field empty , this will not help

I either want a message/notification to pop and say something or make the field empty, the empty might not work as the field is also required.

How can I pop a message with any text in it, I tried raising a warning but that prohibits from saving as its generating an error