Is there a way to create an expand or collapse button for ALL fields that are placed in the RowField or ColumnFields areas. I know I can put it on by individual fields. I would like the fields to begin collapsed, and once I create the view I need, a button to expand all.

I noticed their Javascript method to call the field expand is : pivot_group_toggle(this)
The "this" object is probably the kool pivot table javascript object. You may run the event through the debugger and trace it to find out what is posted to the function.
http://doc.koolphp.net/Controls/KoolPivotTable/JS/ClientEvents/index.php#OnFieldExpand