Hello,

1. That can be changed only with some custom css. 

For instance >>

You can try to add this css underneath in Appearance >> Customize >> Additional CSS field:

.eltd-listing-archive-filter-holder .eltd-ls-archive-filter-item.eltd-full-width-item {
    display:none;
}
.eltd-listing-archive-filter-holder {
    padding-top: 30px
}

or (hide 3rd filter field) >>

.eltd-listing-archive-filter-holder .eltd-ls-archive-filter-item:nth-child(3) {
    display: none;
}

2. Theme labels can be changed or translated to your language with poedit software which is native wordpress way - following guide may be helpful http://code.tutsplus.com/tutorials/translating-your-theme--wp-25014 (read from point 3) or any other plugin for translation such as Loco translate plugin https://wordpress.org/plugins/loco-translate/ and here is beginners guide https://localise.biz/wordpress/plugin/beginners

or if there is some issue with pot file, we can assist you in order to change it directly into the code.

Please let us know if there is anything else we can do for you.

Thank you,
Jerry