I noticed the mounting holes for a Krag sight have been filled and a dovetail added in that area. To get this one in firing condition, maybe a sporting sight to fit the dovetail? Also replacing the cocking piece/firing pin. Spend as little as possible to make it safe.
  There are some threads on cleaning up the stock and metal parts, most involve using the right oil with a lot of elbow grease. For a wall hanger face the good side (bolt handle) out.
  As a word of warning if you handle this thing too much it will grow on you and you will be getting more.