How to add Wishlist/Add to Cart in all products shown in front page in drupal 7?
Install and enable the Commerce Wishlist module and in views add the Commerce Product: Add to Cart form field, then you can see Wishlist/AddToCart button. Also Enable the checkbox "Link products added to the cart from this display to the current path the customer is viewing where the View is rendered".

Don't forget to set permission and configuration.


  Features
  
  
  Provides an “Add to Wishlist” button on the display product node;
  Creates a customizable list with Views to display all products on the Wishlist – both as a page and as a block;
  Recognizes and stores product variations;
  Makes it possible for users to easily delete or switch products in their Wishlist to their Shopping Cart with the click of a button;