momto3young wrote: ...Where can I get the correct files? ...
Follow the instructions from manuals.info.apple.com/en_US/boot_camp_install-setup_10.8.pdf
You may also find helpful info at Boot Camp: Installing Windows 7 Frequently Asked Questions or in Apple - Support - Boot Camp
momto3young wrote: ... How much does Apple charge for help once Apple Care runs out?
That will depend on what service you want. If you do not have a local Apple Store to ask, Contact Apple Support directly and ask them.