Hello,
1/ Theme Options > Styling > Bold Weight For Icons > Off
Also, Theme Options > General > Enable Classic Widgets Panel > On
2/ Add the next code in Theme Options > Theme custom CSS > Global, to hide the SKU:
.product_meta .sku_wrapper {
display: none;
}
3/ There is no such possibility, unfortunately. You can activate our Single Product Builder via Theme Options > Theme custom CSS, it allows you to create the layout of the single product page from scratch depending on your needs.
4/ Pages > edit Shop page > [8theme] Layout options > Sidebar width
Regards