Starting Failed Data Migration Over Again With New Macbook Pro

I just purchased a new Macbook Pro. Upon transferring files from an old Macbook via a backup and Time machine, the startup screen on the new Macbook Pro now just shows white and a spinning disk. I can't even get a normal desktop.

1.New Macbook Pros do not have installation disks in the box. How do I get back to the welcome setup screen and start over when the migration did not work?