No. You can install from the same installation Windows 7 disk since you are removing Windows from the Parallels installation and reinstalling using Boot Camp. The license is good for a single installation which you will have after you install in Boot Camp and remove from Parallels..
No. You must create a Boot Camp partition using Boot Camp Assistant then install Windows on the Boot Camp partition. You can copy your data from your parallels installation to your Boot Camp partition. Then uninstall and remove the Parallels installation of Windows.