I Inherited this. What would you do?

This was my father's home, back half built in 1873 and front half built in 1906. I grew up here, but it's gone several decades without proper maintenance. What would you do, knowing that it's owned free and clear?

This was my father's home, back half built in 1873 and front half built in 1906. I grew up here, but it's gone several decades without proper maintenance. What would you do, knowing that it's owned free and clear?