Hello,

1. Yes, you can change CSS properties of this area with the following CSS code

.footer-container,
.footer-container p,
.footer-container a {
	font-size:16px;
}

2. Try to use this code snippet

.mc4wp-form-fields p {
	display:inline-block!important;
}

3. Sorry, but there is no such ability.

4. Just add a text widget to the footer with the following code

<p><img src="//xtemos3.r.worldssl.net/basel/wp-content/uploads/2015/08/payments.png"></p>

5. What exactly do you mean by “styling”?

6. You can change footer layout in Theme Settings -> Footer.

7. Sorry, but it requires additional code customization.

8. You can configure your shipping option in WooCommerce -> Settings -> Shipping.

Regards