Customize single product page in woocommerce

All function call in wc-template-function.php file check it
location is woocommerce/include/
if you change position of product title,single rating,single price,description,add to cart then

follow below code.

go to content-single.php file

<div class="summary entry-summary">

<?php
/**
* woocommerce_single_product_summary hook
*
* @hooked woocommerce_template_single_title - 5
* @hooked woocommerce_template_single_rating - 10
* @hooked woocommerce_template_single_price - 10
* @hooked woocommerce_template_single_excerpt - 20
* @hooked woocommerce_template_single_add_to_cart - 30
* @hooked woocommerce_template_single_meta - 40
* @hooked woocommerce_template_single_sharing - 50
*/
//do_action( 'woocommerce_single_product_summary' );

woocommerce_template_single_title(); 
             woocommerce_template_single_rating();
             woocommerce_template_single_price(); // this will output the price text
             woocommerce_template_single_excerpt(); // this will output the short description of your product.
             woocommerce_template_single_add_to_cart();
             woocommerce_template_single_meta();
             woocommerce_template_single_sharing();
?>

</div><!-- .summary -->

here all get single single you can set in your html

if you want to change breadcub then go to single-product file

follow below

comment

//do_action( 'woocommerce_before_main_content' );

this and

this two funcion

woocommerce_output_content_wrapper();
and
woocommerce_breadcrumb();

set it your ways