Hello,
1. To change the separator on woocommerce pages, you need to find woocommerce_breadcrumb function -> http://prntscr.com/ieiolq –
https://github.com/woocommerce/woocommerce/blob/master/includes/wc-template-functions.php
and copy this to functions.php file of child theme,
To change this for default pages (portfolio, posts, etc) – legenda/framework/theme-functions.php ‘etheme_breadcrumbs’ http://prntscr.com/ieivp2 http://prntscr.com/ieiqz7
and make changes in the functin also via child theme.
2. You can use translation files and use translation filed just to change the text. Loco translate plugin will help you to do this in no time https://www.8theme.com/documentation/xstore/theme-translation/base-theme-translation/ (the same for legenda theme).
3. Please provide a screenshot for better understanding.
4.
.single-product .page-heading .row-fluid .span12 .back-to {
left: 0;
right: auto;
}
Regards