Replace the 11th line with the code below (untested):
$term_list .= '<input type="radio" name="typ" value="' . $term->slug . '"> ' . $term->name . ' Number of Posts:'. $term->count;
It appears that get_terms has a post count return value.
Replace the 11th line with the code below (untested):
$term_list .= '<input type="radio" name="typ" value="' . $term->slug . '"> ' . $term->name . ' Number of Posts:'. $term->count;
It appears that get_terms has a post count return value.