Hello, for:
1- How did you build it like that? The menu and the slider, did you add any css?
2- The theme doesnt have a facebook comment feature for products, so if you have a plugin that adds that, just delete it.
I do not have a mac to test it, can you try to deactivate some plugins and testing again?
For the related products, add this to style.css of child theme
div#jp-relatedposts {
display: none !important;
}
About the picture speed, that is not available right now
3- To change the color, use this css at style.css of child theme
.icon-basket-full-alt:before {
color: black;
}
For the transparency, you can use this instead
.icon-basket-full-alt:before {
color: rgba(0, 0, 0, 0.3);
}
For the fonts, check http://codex.wordpress.org/Playing_With_Fonts