If it's a Mk I, Mk II, or Mk III pistol, trust me on this one - find a gunsmith who will assemble it and show you how it's done. It is not a very simple task, least of all, when you've never done it before. If said gunsmith will show you how to assemble it, then watch over you while you go through the assembly a couple times, that would be ideal.
You can request an owner's manual for free on Ruger's web site.
50-500 depending on EXACTLY what you have.
A call to Ruger will get you the answer.
If Ruger's website is up, they have extensive sn data on it.
Made in 1966.
by serial number
Ruger has a sn search function on their web site.
Ruger has extensive sn data on their website.
50-250 usd
50-200 USD or so
50-250 usd
Ruger has a sn function on their web site.