I just received my grandfather's original military issue 1898 Krag(SN423027). It has not been shot to my knowledge since he was discharged.
I have several questions related to maintenance and cleaning:

What should I be looking for to determine if it's safe to shoot?

Do I need to have a professional gunsmith look it over?

What is safe to use on the wooden parts for cleaning or sealing and what is the process?

What other parts should I be cleaning?

I don't want to change the patina so what should I avoid?

This weapon obviously holds a huge amount of sentimental value and I want to ensure that it's in as good a shape as possible when I hand it down to my grandson.
I'm also looking for original accessories:
Bayonet
Sling
Scabbard
Cleaning rods
Oil container

What can I expect to pay for these things?

Thanks!