I can agree with Altex's statement regarding the usefulness of learning piano. You don't have to become a piano whiz - just use it as a learning aid. It is a great tool for grasping basic music theory and becoming familiar with essential knowledge. Even if you have no dreams of performing piano, it is worth learning your way around a keyboard.
Having a 'real' piano is nice, but even a little cheapo plastic keyboard is useful for learning about music theory. You don't need to learn how to read music (although it is good to know) to benefit from knowing piano basics.
Google up 'on-line piano lessons' or 'free piano lessons' to see what is out there.
Also, if you have a piano that has been sitting around for years unused, or has been moved to new residences repeatedly - the instrument could probably benefit from a professional tuning and regulating. Every area has professional piano tuners and many of these pros also deal in used and re-conditioned instruments. James
"That darn Pythagorean Comma thing keeps messing me up!"
[url]http://en.wikipedia.org/wiki/Pythagorean_comma[/url]