Hello,
1. You can add some widgets on sidebar to look same like our demo. For social profiles you have to use navigation menu widget and select the social profiles menu. To create a social profiles menu just see this instruction.
2. Sorry you can not show both site title/description and logo at the same time. what you can do is just add the site title/description into your logo and set that logo.
3. Add below Custom CSS code in Appearance > Customize > Additional CSS to reduce the logo size on mobile devices.
@media only screen and (max-width: 767px) {
#site-logo {
width: 27px;
}
}
Thank you for using our theme.