You can either do one of two things:

Get it completely restored by one of the fine gunsmiths mentioned by the previous posters (Turnbull, Chicoine, etc) or just keep it as a curio and keepsake. The restoration will likely cost much more than the gun is monetarily worth, but it's hard to put a dollar value on a sentimental item, so what it is worth to you - only you can answer that. If you do go the restoration route, you might as well do it right, otherwise just dedicate it to a keepsake.

chief38