I just bought a new Mac book pro and it’s asking me for a password

Did you buy directly from Apple? If not, there are many reports of unscrupulous third-party resellers selling used Macs as new and not properly clearing old accounts. If you did not buy directly from Apple and the computer is asking for a password, it is not new. You will not be able to fully use the computer and your should return it for a full refund.

If you bought it from Apple they will help you get the computer working. Bring your receipt to the store.

hmmm...

Did you set your up your Mac and able to log in?

Set up your new Mac - Apple Support

A brand new Mac shouldn't be asking for a password. Could this Mac have had a previous owner?

Neither am I, but it sounds like its OK.