As Defariswheel stated it is a fine Mauser and from the pictures I can't see too much wrong with it, if anything!
You really don't need, on this gun, to take the bolt apart! Just take it out of the stock and get some "gun scrubber" in a pressure can and have at it and blow it off!
You've got a very fine rifle there - is the bore O.K.? If so, relax, it's a nice rifle. With the side safety and different trigger just don't take it apart.