Custom registration form with Paypal or Bank transfer payment

We need a 3-Step registration form for a learning centre: Step 1: Fill in personal details and user can choose the following options: Checkboxes with different subjects. Level (e.g. Secondary 1, 2, Junior college, University) Subjects. >> Conditional selections: depending on subject chosen, a different set of drop-down values will appear. This drop-down shows the classes/schedules available. Full classes will still be shown but greyed out. (Admin are able to edit the drop-down and specify which ones to be displayed/greyed out). Step 2: - shows a page with terms and conditions Step 3: - Payment method (Paypal or Bank transfer details). - Admin and users will receive email notifications upon submission. - Users will receive email with confirmation/receipt, which can be printed in PDF. Administrator: - Admin can check in backend the list of registrations (database) - Admin can modify form fields / option values - Paypal payment should be auto-approved - For Bank transfer payments, form submissions shows "Pending". Admin can change the status to "Complete" and send user the email confirmation. Forms can be in Joomla or Wordpress. *** The main website is in HTML (no need to edit these) but registration forms should have same design template as main website.