I believe that you probably have a pre-woodsman. It would book out from $1600 in excellent condition down to $200 in poor condition.
100-350 or so
A call to Ruger will get you the answer.
Request a manual from Ruger on their web site.
$100-$430 or so, depending on condition. USD - United States Dollars
100-400 USD
$100-$250, dpending on condition.
The serial number. Ruger's webiste has extensive serial number data you can pull up. Go to the product history link on that page under customer service tab.
100-400 USD depending on specifics
No such model. There was a SP101; 100-300
15 or 25 yards
125 or so
100-400 or so