Difficult questions?

Please could you help me with these questions?

1 – Outline input fields with a specific color.

2 – Remove “← Back to MYSITE” link under the login fields.

3 – Remove field “password”, and allow access only to the mail.

4 – I want that do not display the e-mail message of recovery, user name or password. If you enter the wrong email, the form not only goes on, but did not offer help.

Thank you!