1. In the drop down boxes (i.e. Colour selection).
When clicking the <Apply> button, as well as applying the feature, also the ability to remove the "DropDown Box".

2. The Submit Button - Changing the colour. (How, it doesn't work.)

3. Ability to change the colour of <Section Breaks>.

4. Possibility of adjusting the width of the <"Captcha" Box>.

5. Ability to change the colour of the <"Captcha" Box>.

6. Ability to change the colour of the background of <Filling in Boxes>.

That is for starters, I have just had a cursory glance.
I hope this is what you want.

You must be talking about the Form builder.

Since you are saying "I hope this is what you want", does that mean that you are in a dialogue with the CC support? If so, this is not the right place to respond. Use the ticket system under the link 'Support' at the top of the page instead.

Looks to be a wish list.