Not necessary for normal cleaning. If you just have to, find a gunsmith and ask for help.
Your Hi Standard snub nose revolver is valued at between 40-190 dollars depending on overall condition and a good bore.
Depends on who made it, etc., could be 50, could be 5000
Requires professional appraisal.
It should be.
Handguns are illegal in Australia without a very stringently-policed special permit.
Could be anywhere from $100 to over $1,000, depending on WHICH revolver, and it's condition.
Not really worth the time or money. If you have to have it done, let a gunsmith do it.
100-400 USD
You will have to call S&W
About $250. May be more or less, depending on condition.
50-500 usd
Can't be answered without knowing who made it. Even then, there might not be data.