Hi,
It is unfortunately not possible to create a filter to search only titles.
To translate/change the filter header, click on the ‘Change display mode’ button under the taxonomy term filters panel, where you should be able to find the header text for that taxonomy: https://i.imgur.com/nj6Snht.png
To display tax included price, use the _tax_price field instead of the _price field. That will do the trick.