Delete Title and Icone in Homepage

First, check your theme’s settings, if breadcrumbs can be turned on/off. If not, the following CSS will hide breadcrumbs:

nav.breadcrumbs {
    display: none;
}

Put the above lines, into Customize -> Additional CSS, or into your theme’s style.css.

To remove sharing buttons, use the following CSS:

div.share.js-share {
    display: none;
}