Importing MS Word files ...

I have a Dell, and a Toshiba.
Both have extensive MS Word files .doc on them.
I'd like to import those files into my MBpro.

Do I need to purchase & install a copy of Word first?
I assume I do. Just want to be sure.
Can I buy Word by itself, or do I have to buy an Office Suite which I really have not use for.

Is there anything else special that has to be done in order to bring the files in and begin to use and edit them?

Thanks in advance.