get specific values from WordPress meta_value

You should pretty much never need to use $wpdb to grab data. There are helper functions built into WordPress that will do what you need.

In this case, use get_post_meta().

Having used https://www.unserialize.com/ to unserialize your data, it looks like the item list in your question is in $meta['toys_item']['toys_item_ranger']. I’ll use that in my code snippet to make a list like the one you’re looking for.

$meta = get_post_meta( $post_id, 'fat-mb-boat-toys', true );
if (
    ! empty( $meta )
    && ! empty( $meta['toys_item'] )
    && ! empty( $meta['toys_item']['toys_item_ranger'] ) 
) {
    foreach ( $meta['toys_item']['toys_item_ranger'] as $toy ) {
        echo $toy . '<br />';
    }
}