Few question about Travelify theme

Thanks for detailed explanation on what you are trying to achieve.

  1. Add this to Theme Options - Other - Custom CSS
.entry-meta-bar {
    display: none;
}
.entry-header {
    display: none;
}
article {
    background: transparent;
    box-shadow: none;
    -webkit-box-shadow: none;
}
.entry-content {
    padding: 2% 0;
}
  1. There is no shortcode for slider and it will work only on homepage. You simple need to set Featured Images for each post and use Post/Page ID inside Theme Options for slider and you are ready to go. Here is more information on how to use featured images: http://en.support.wordpress.com/featured-images/

  2. Here is how you can change theme color: https://colorlibsupport.com/t/how-to-change-travelify-theme-color/

  3. Here is more information on fonts: https://colorlibsupport.com/t/how-to-change-default-travelify-font/

  4. Use Custom Header Image which is created to cover the entire header width. Here is more info on that: http://make.wordpress.org/support/user-manual/customizing-wordpress/themes/custom-header-image/