Magento – How to remove Proceed to checkout button in cart page

You can disable the checkout button by adding the following to the quote object (in the event your use for your observer sales_quote_save_before):

$quote->setHasError(true);
$quote->addErrorInfo(
    'error',
    'checkout',
    null,
    Mage::helper('checkout')->__('The maximum order qty is %d', 500),
    null
);

This will display the error message in the cart and remove the buttons. This solution is also used by the catalog_inventory module when a product qty is over the available qty.

Open cPanel or FTP and navigate to the following files:

app\design\frontend\tm_themes\themeXXXX\template\catalog\product\compare\list.phtml

app\design\frontend\tm_themes\themeXXXX\template\review\customer\list.phtml

app\design\frontend\tm_themes\themeXXXX\template\review\product\view\list.phtml

app\design\frontend\tm_themes\themeXXXX\template\tm\productlistgallery\list.phtml

app\design\frontend\tm_themes\themeXXXX\template\wishlist\item\list.phtml

Due to the fact the catalog pages can by viewed in either grid or list mode, there are two references to the Add to Cart button in the code within the list.phtml file. Make sure to comment out the code in both sections.

Look up this code and comment it: ?

<button type="button" title="<?php echo $this->__('Add to Cart') ?>" class="button btn-cart" onclick="setLocation('<?php echo $this->getAddToCartUrl($_product) ?>')"><span><span><?php echo $this->__('Add to Cart') ?></span></span></button>

Buyer can checkout even after removal of this add to cart button. Because whenever you click on the product from product list page it will take you to magento's product detail page.there you can add product to cart.then you can go to checkout that product.