I am wanting some CSS formatting for boxes that

I am wanting some CSS formatting for boxes that are widgets.

What I want the box to look like is what is being used on my sister-site restministries.com – I have attached a screenshot with the box circled (all the widget boxes have this default in my restministries.com theme)

Question 1: Can the code I am wanting just be around certain widgets and not all of them? What would the CSS look like (and for what element) to be used on http://restministriessunroom.co/

Question 2: I am using Ads by datafeedr.com plugin for some rotating images/ads in places like here http://restministriessunroom.co/members/ under “featured groups.” The plugin asks a bunch of questions and then creates a shortcode. The variables it asks are below. Perhaps there is an easier way to do this–but I know if you give me the code, I still won’t know what goes where.

Each option below has a box I would put the code into. It is located here: http://restministriessunroom.co/wp-admin/options-general.php?page=dfads-settings

Container html:The wrapping container’s HTML tag. (Default: div)

Example: div, p, span, ul, ol, etc…

Use none to prevent this tag from being rendered.

Do not include these characters: < > /

Container CSS ID: The CSS ID of the wrapping HTML container.

Example: ads_150x150, top-ads, etc…

Do not include the hash symbol (#)

Container CSS class: The CSS class of the wrapping HTML container.

Example: ads, banners, etc…

Do not include a period (.)

Ad HTML tag: The HTML tag wrapping each ad. (Default: div)

Example: div, span, ul, ol, etc…

Use none to prevent this tag from being rendered.

Do not include these characters: < > /

Ad CSS Class: The CSS class of the tag wrapping each ad.

Example: ad, banner, etc…

Do not include a period (.)