Payments can be made without creating an account with PayPal
After clicking on "Next" you will have an opportunity to enter your email address and confirm the payment.
Until then your card will not be charged.
Look at the URL of the website. If it begins with https instead of http it means the site is secured using an SSL Certificate (the s stands for secure).
SSL Certificates secure all of your data as it is passed from your browser to the website's server.