I have added "Testimonials" Tab in Admin Panel But not able to show Testimonials

I have added Testimonials Tab in Backend Admin Panel Tab. I can add new Testimonials there. Testimonials are Working perfect in Admin Panel. Saving all..
But i am unable to show on Front page. I want to show on Index page..
Here are my codes which i have added into “Functions.php”

add_action( 'init', 'testimonials_post_type' );
function testimonials_post_type() {
    $labels = array(
        'name' => 'Testimonials',
        'singular_name' => 'Testimonial',
        'add_new' => 'Add New',
        'add_new_item' => 'Add New Testimonial',
        'edit_item' => 'Edit Testimonial',
        'new_item' => 'New Testimonial',
        'view_item' => 'View Testimonial',
        'search_items' => 'Search Testimonials',
        'not_found' =>  'No Testimonials found',
        'not_found_in_trash' => 'No Testimonials in the trash',
        'parent_item_colon' => '',
    );

    register_post_type( 'testimonials', array(
        'labels' => $labels,
        'public' => true,
        'publicly_queryable' => true,
        'show_ui' => true,
        'exclude_from_search' => true,
        'query_var' => true,
        'rewrite' => true,
        'capability_type' => 'post',
        'has_archive' => true,
        'hierarchical' => false,
        'menu_position' => 10,
        'supports' => array( 'editor' ),
        'register_meta_box_cb' => 'testimonials_meta_boxes', // Callback function for custom metaboxes
    ) );
}
function testimonials_meta_boxes() {
    add_meta_box( 'testimonials_form', 'Testimonial Details', 'testimonials_form', 'testimonials', 'normal', 'high' );
}

function testimonials_form() {
    $post_id = get_the_ID();
    $testimonial_data = get_post_meta( $post_id, '_testimonial', true );
    $client_name = ( empty( $testimonial_data['client_name'] ) ) ? '' : $testimonial_data['client_name'];
    $source = ( empty( $testimonial_data['source'] ) ) ? '' : $testimonial_data['source'];
    $link = ( empty( $testimonial_data['link'] ) ) ? '' : $testimonial_data['link'];

    wp_nonce_field( 'testimonials', 'testimonials' );
    ?>
    <p>
        <label>Client's Name (optional)</label><br />
        <input type="text" value="<?php echo $client_name; ?>" name="testimonial[client_name]" size="40" />
    </p>
    <p>
        <label>Business/Site Name (optional)</label><br />
        <input type="text" value="<?php echo $source; ?>" name="testimonial[source]" size="40" />
    </p>
    <p>
        <label>Link (optional)</label><br />
        <input type="text" value="<?php echo $link; ?>" name="testimonial[link]" size="40" />
    </p>
    <?php
}
add_action( 'save_post', 'testimonials_save_post' );
function testimonials_save_post( $post_id ) {
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
        return;

    if ( ! empty( $_POST['testimonials'] ) && ! wp_verify_nonce( $_POST['testimonials'], 'testimonials' ) )
        return;

    if ( ! empty( $_POST['post_type'] ) && 'page' == $_POST['post_type'] ) {
        if ( ! current_user_can( 'edit_page', $post_id ) )
            return;
    } else {
        if ( ! current_user_can( 'edit_post', $post_id ) )
            return;
    }

    if ( ! wp_is_post_revision( $post_id ) && 'testimonials' == get_post_type( $post_id ) ) {
        remove_action( 'save_post', 'testimonials_save_post' );

        wp_update_post( array(
            'ID' => $post_id,
            'post_title' => 'Testimonial - ' . $post_id
        ) );

        add_action( 'save_post', 'testimonials_save_post' );
    }

    if ( ! empty( $_POST['testimonial'] ) ) {
        $testimonial_data['client_name'] = ( empty( $_POST['testimonial']['client_name'] ) ) ? '' : sanitize_text_field( $_POST['testimonial']['client_name'] );
        $testimonial_data['source'] = ( empty( $_POST['testimonial']['source'] ) ) ? '' : sanitize_text_field( $_POST['testimonial']['source'] );
        $testimonial_data['link'] = ( empty( $_POST['testimonial']['link'] ) ) ? '' : esc_url( $_POST['testimonial']['link'] );

        update_post_meta( $post_id, '_testimonial', $testimonial_data );
    } else {
        delete_post_meta( $post_id, '_testimonial' );
    }
}
add_filter( 'manage_edit-testimonials_columns', 'testimonials_edit_columns' );
function testimonials_edit_columns( $columns ) {
    $columns = array(
        'cb' => '<input type="checkbox" />',
        'title' => 'Title',
        'testimonial' => 'Testimonial',
        'testimonial-client-name' => 'Client\'s Name',
        'testimonial-source' => 'Business/Site',
        'testimonial-link' => 'Link',
        'author' => 'Posted by',
        'date' => 'Date'
    );

    return $columns;
}

add_action( 'manage_posts_custom_column', 'testimonials_columns', 10, 2 );
function testimonials_columns( $column, $post_id ) {
    $testimonial_data = get_post_meta( $post_id, '_testimonial', true );
    switch ( $column ) {
        case 'testimonial':
            the_excerpt();
            break;
        case 'testimonial-client-name':
            if ( ! empty( $testimonial_data['client_name'] ) )
                echo $testimonial_data['client_name'];
            break;
        case 'testimonial-source':
            if ( ! empty( $testimonial_data['source'] ) )
                echo $testimonial_data['source'];
            break;
        case 'testimonial-link':
            if ( ! empty( $testimonial_data['link'] ) )
                echo $testimonial_data['link'];
            break;
    }
}

Please tell me How i can show Only Text and Client Name on index page.. I want to use as Carousel Slider.. HTML is already done.
I made a tweak into it but it shows only Posts of WordPress which i have added. Not Testimonials.. i want testimonials… Please Help