Need code help

I have a critical problem for integration woocommence in my custom created theme.

As per instruction, I already have created woocommerce.php file with save as page of page.php.

Here is my woocommece.php page code

<?php get_header(); ?>

<?php include (TEMPLATEPATH . ‘/slider.php’); ?>

<?php include (TEMPLATEPATH . ‘/newsletter.php’); ?>

<div id=”main-container”>

<div id=”container”>

<div id=”content” role=”main” class=”woocommerce”>
<?php woocommerce_content(); ?>
</div>

</div>

</div>

<?php get_footer(); ?>

Here is my function.php file coding

<?php

register_nav_menus( array(

‘primary’ => __( ‘Top Navigation’, ‘sudipta’ ),
‘footermenu’ => __( ‘Footer Navigation’, ‘sudipta’ ),

) );

add_theme_support( ‘post-thumbnails’ );

function show_avatar($comment, $size)
{ $email=strtolower(trim($comment->comment_author_email));
$rating = “G”; // [G | PG | R | X]
if (function_exists(‘get_avatar’)) {
echo get_avatar($email, $size);
} else {
$grav_url = “http://www.gravatar.com/avatar.php?gravatar_id=
” . md5($emaill) . “&size=” . $size.”&rating=”.$rating;
echo “<img src=’$grav_url’/>”;
} }
function my_wp_trim_excerpt($text) { // Fakes an excerpt if needed
if ( ” == $text ) {
$text = get_the_content(”);
$text = apply_filters(‘the_content’, $text);
$text = str_replace(‘]]>’, ‘]]>’, $text);

// THEME MODIFICATION
// Get the star html code
preg_match(“/\<\/p\>.*?(\<div.*?raterclear\”\>.*\<\/div\>.*\<\/div\>)/is”, $text, $matches);
$starCode = isset($matches[1])?$matches[1]:”;
$text = str_replace($starCode, “”, $text);

$text = strip_tags($text, ‘<p>’);
$excerpt_length = 80;
$words = explode(‘ ‘, $text, $excerpt_length + 1);
if (count($words) > $excerpt_length) {
array_pop($words);
array_push($words, ‘[…]’);
$text = implode(‘ ‘, $words);
}
}
// THEME MODIFICATION – added ‘. $starCode’
return $text . $starCode;
}
remove_filter(‘get_the_excerpt’, ‘wp_trim_excerpt’);
add_filter(‘get_the_excerpt’, ‘my_wp_trim_excerpt’);

add_theme_support(‘woocommerce’);

?>

But my problem is:
1. I can’t add featured image of any product
2. How I will modify CSS of my woocommece product page? Where I will get all id and classes?

Please help me quickly.

https://wordpress.org/plugins/woocommerce/