First of all, welcome to the forums. I am glad to see you choose Linux. As for your question, GNU/Linux is a great platform and is based on open-source (freeware) software. To get started you will need:
[indent]1) A spare computer to install the operating system onto (alternatively
multi-boot or
windows embedded).
2) Choose a distro and download it (for example
choose Debian and download it + info here)
3) Burn the ISO to a CD
4) Boot from CD to install
3) For help, use our forums here and help files contained therein
[/indent]Good luck and keep us posted on your progress
