1) Comment out the out of date files in the child theme and copy the latest versions of these files to your child theme. Edit the latest versions of files and add the changes you previously added to files that are out of date.
3) Don’t understand your question. What text files are you talking about? WP theme does not include text files, only PHP, JS, CSS and .pot file(to allow theme translation). Check theme docs to find out how to translate theme https://xstore.helpscoutdocs.com/article/30-base-theme-translation
Translation files include hardcoded strings. All the texts that you add via theme options (like my account text) should be changed via theme options.
5) https://www.w3schools.com/css/ Who customized theme for you? You have the custom CSS code in the child theme style.css.
6) Check the alignment now.
7) Use Theme Options > WooCommerce > Shop > Product style options to enable/disable elements http://prntscr.com/rrn39k
8) This is the product name and it’s too long to show it full, so system cut the product title. If you want to disable Sticky add to cart bar go to Theme Options > WooCommerce > Single product > disable Sticky add to cart option.
