Dear @edouard

You will find the file /root/resources/views/layout/header.php file for changing the menu and submenu

2. Which figures of donations do you need, please describe a little bit more
3. Please find the css code to change the banner color located at root/assets/css/style.css

.main-banner {
	padding: 150px 0;
	background: #d1d1d1 url("../images/main-banner.jpg") no-repeat scroll center center / cover;
	position: relative;
	color: #fff;
	text-align: center;

Which advertisements do you need to place? you can place it to /root/resources/views/home.blade.php

Best regards