Problem:
How to display taxonomy featured image
Solution:
You can use Types shortcode to display the termmeta field values.

For example:

[types termmeta='kategorie-featured-image' alt='%%ALT%%' title='%%TITLE%%' width='600' height='300' align='center' resize='crop'][/types]

You can find proposed solution, in this case, with the following reply:
=> https://toolset.com/forums/topic/tax-featured-image/#post-625183

Relevant Documentation:
=> https://toolset.com/documentation/customizing-sites-using-php/functions/#image

Problem: I would like to create a Product Category archive that lists the top level categories with links to those category archives. On those archives, I would like to show a list of subcategories as well as a list of products in the current category (but not in the subcategories).

Solution:
- Create a View of Products (View 1), filtered by Product Category term, set by the current archive page. (step-1.png)
- In the Loop Output of View 1, insert a post title with link shortcode to link to the Product page.
- Create a View of the taxonomy Product Categories (View 2). Filter this View by taxonomy parent, where the term parent is None.
- In the Loop Output of View 2, insert a taxonomy link shortcode.
- Duplicate View 2 (call it View 3). Change the Query Filter to filter by term parent, set by the current taxonomy archive page.
- In the Loop Output editor of View 3, Replace the "No items found" text with View 1.
- Create a Layout for Product Categories ( Product Listing Layout ) and insert a WordPress Archive cell
- In the WordPress Archive Loop Output editor, remove the contents of the wpv-loop tag. Insert View 3 just above the wpv-loop tag.
- Create a custom Page and insert View 2.
- Add the following code to your child theme's functions.php file:

add_filter( 'wpv_filter_query', 'only_term_filter',99,3 );
function only_term_filter( $query_args, $views_settings, $view_id) {
  $view_ids = array( 12345 );
  if (in_array($view_id, $view_ids)){
    foreach($query_args['tax_query'] as $tq) {
      if( isset( $tq['taxonomy'] ) ){
        $tax = $tq['taxonomy'];
        $term = get_term_by('id', $tq['terms'], $tax);
        $termChildren = isset( $term->term_id ) ? get_term_children($term->term_id, $tax) : null;
        $query_args['tax_query'][] = array(
          'taxonomy' => $tax,
          'field' => 'id',
          'terms' => $termChildren,
          'operator' => 'NOT IN'
        );
      }
    }
  }
  return $query_args;
}

Relevant Documentation:
https://toolset.com/documentation/programmer-reference/views-filters/#wpv_filter_query
https://toolset.com/documentation/user-guides/creating-wordpress-custom-post-archives/
https://toolset.com/documentation/user-guides/filtering-views-by-taxonomy/

Problem:
How to output a Types custom field directly in the header.php file.

Solution:
Use the types_render_field function.

Relevant Documentation:
https://toolset.com/documentation/customizing-sites-using-php/functions/

Problem: I have created a Layout with multiple columns, but all the cells are appearing full-width.

Solution: In this case, the problem can be corrected by changing the Bootstrap Loading settings in Toolset > Settings > General tab. Choose "Toolset should load Bootstrap 3".

Relevant Documentation: https://toolset.com/documentation/user-guides/displaying-content-using-grids/