get meta fields and taxonomy of any post type

If I understand correctly you want to get the taxonomies associated with a custom post type object, not with a specific single post. To do that you can use get_object_taxonomies(). For example, to get the names of the associated taxonomies to “my-custom-post-type”:

 $taxonomies = get_object_taxonomies( 'my-custom-post-type', 'names' );

 foreach( $taxonomies as $taxname ) {
     echo $taxname;
 }

I think you can not do the same for meta fields because meta fields are associated with a specific single post not with a post type object. You will have to hardcode the relationship between metafields and custom post type.