How can I use the Commerce Paypal module module without the Commerce module? I have a form, which has an amount and item detail values to pass to PayPal.  

I have installed the Commerce Paypal module, but I don't find any clue on how to integrate it so that when the form is submitted, it should go to PayPal for transaction. On success, it should redirect to the success URL; likewise, it should happen on failure, where the users are redirected to  the failure URL. I haven't installed the Drupal Commerce module as there is no use of pages like catalogs and checkout in this system.

How can I use the Commerce Paypal module?
Commerce Paypal has the following dependencies:


commerce
commerce_ui
commerce_payment
commerce_order


Installing/using Commerce Paypal without Drupal Commerce isn't possible; it's a supplemental payment module, and requires Commerce's API to work.

You may instead be interested in something like Webform Paypal


  The Webform Paypal module sends the user to Paypal to complete a payment whenever they submit a webform containing the component on your site.