Hello,

1. Are you mean the black background?

2. The color for the “Add to cart” button comes from the settings of the “Accent buttons” area in Theme Settings -> Styles and colors -> Buttons.

https://monosnap.com/file/oEDihLf6IA90z29rZdMAg7QBeoIyIE

3. With the help of this code, you can change the cart icon, enter it in Theme Settings -> Custom CSS.

.product-grid-item .wd-add-cart-icon>a:before {
    content: "\f120";
    font-family: woodmart-font;
}

Kind Regards