Once you have created your account with Stripe the first thing you will need to do is open your ecommerce template admin payment providers page. Locate the payment provider listed as "Stripe" and click on the Modify button. Fill in the details as shown below:
Show As - this is the text that will appear on your checkout for the customer to choose the payment method. You may want to enter the payment provider name or something more generic like "Credit Card".
The Secret Key and Publishable Key are available in your Stripe admin under Your Account > Account Settings > API Keys
To test payments enter the keys Test Secret Key and Test Publishable Key. When you are ready to go live with your store change those to the Live Secret Key and Live Publishable Key.
Enter the name of your store in the Store Name field, this will appear above the payment form on checkout.
For testing purposes use the credit card number 4242 4242 4242 4242 and any expiry date in the future. Other test numbers are available from Stripe.
NOTE - Although payments are taken in a pop up box on checkout for security reasons you should have an SSL certificate installed on your site to accept payments through Stripe. For testing purposes an SSL certificate is not required.
To add your own image or logo to the checkout pop up, make a graphic 128px x 128px, save it as 128x128.png and then upload to the root of your site.