Hi
1) The color is set in the color customiser, for the width, add this to your custom css:
#footer .widget ul li, #footer .widget_categories ul, #footer .widget_archive ul, #footer .widget_nav_menu ul, #footer .widget_recent_comments ul, #footer .widget_meta ul, #footer .widget_recent_entries ul, #footer .widget_product_categories ul {
border-color: #333333;
border-top-width: 1px;
}
2) Sure, add this:
@media only screen and (min-width: 768px) {
#back-to-top {
display: none;
}
}
3) Not currently sorry, people kept getting it confused for reviews so we decided to remove it
– Kyle