Make sure gun is unloaded! Lock slide to rear. Remove magazine. Use any commercial gun cleaner(Hoppe's,etc) Use soaked patches to swab barrel inside and out, breech area,magazine well,etc. Wipe down with dry patches
Colt woodsman 22, about $500.
Depends on the pistol. Typically 10 rounds for a Colt Woodsman.
100-2000 USD or so
colt woodsman 22 automatic 851119 made about 1934
A Colt woodsman .22 with that serial number was made in 1930.
100-1000 USD or so depending on specifics
100-1000 depending on condition
You will have to call Colt with the sn to find out.
Best to ask a gunsmith for help.
yes
best let a gunsmith dissemble & clean it
Best left to a gunsmith.