Hello,
1) Are you talking about the cart icon in the header? You may use the following custom to change the color of this icon
.shopping-container.ico-design-4.ico-bg-yes .cart-bag:before {
color: #c78140;
}
2) Use
.form-row.place-order input[type="submit"] {
background-color: #c68240;
color: #44271e;
}
.form-row.place-order input[type="submit"]:hover {
background-color: #af7239 !important;
border-color: #af7239 !important;
color: #f8f8f8;
}
3) It’s not our theme fields. Contact plugin author with this question.
4) Use string translator http://prntscr.com/i2rmqf
Regards