You can use these apps (search apps in odoo apps by names provided below) to change the whole login page style.

Moreover, these apps provide the ability to define your own favicon and logo as you wish.

Apps Name:

Minimalist Login Form

Creative Login Form

Advanced Login Form

no idea bro

Hi,

To create a page in website, You have to create a template. Just refer the template of the contact us form and see how it is working.

 website_crm_templates.xml file in website_crm module.

Also go  through this : https://www.odoo.com/forum/help-1/question/how-to-add-the-new-page-in-website-using-code-120067

Thanks

Thanks