Editing a Registration Form

Hi they all.

I use classipress theme. I have 3 questions.

1. How can I have only one country in the phone number field in the registration form and remove all other countries?
2. How can I set the Type input of the “Input Field” option to number when adding a new field to the registration form? “<input type=”number”>”
3. How to redirect “Add Listing” page to Registration Form.

Thank you, have a nice day.