1. Can I change the appearance of/remove the donate box on the front slider? – Go to Appearance >> Theme Options >> Basic settings >> Custom CSS >> Here you can add this code
2. For Urgent Causes, can I remove the “Donate” area (i.e. the donate $x of $x) – Use the above method.
3. Can I change the order of the sections? Or is Join Us Urgent Causes always the 3rd section, etc. – You can change the section order but for this you need to rearrange the section contents.