Hi Maria Leopold,
Thank you for your interest in our CMS.
Yes, we have this feature out of the box. The users profiles could even be extended - you can have unlimited number of fields. This means that if you need to add an another field (for example User's Car), you can do it anytime with a modification in the web.config file. Please take a look at the attached screenshot - this is the default user profile screen.
Don't hesitate to contact us if you have other questions - we would be glad to provide you with an answer.
the Telerik team