You will need a basic cleaning kit, available at most gun shops or sporting goods departments, powder solvent, oil and patches- and you will need a computer. Use the link below to go to the owners manual. Cleaning instructions are around page 22. For any other lurkers out there- owner's manuals on MANY firearms are available for the asking from the makers IF they are still in business- check their websites.
You do not need to remove the picatinny rail on top to dissasemble for thorough cleaning. The tiny screws will eventually strip out of the aluminum receiver if you remove the rail too often. The firearm will swing apart with a little pressure,
Dougan's book on Ruger will have what you want.
You can request a owner's manual at the Ruger website.
The Ruger SR-22 has an MSRP of $629, but they can be found closer to the $500 range. IMO, still way too much for what it is - better just to get a 10/22 for $220 at Dick's Sporting Goods, then dress it up to look tacticool if you see fit to do so.
MidWay
Yes they are. They are non-restricted because they have a barrel over 16", it is 16.3" to be exact, and they are a rim fire AR.
The ruger rifle
You can request a manual from Ruger on their web site.
Contact Ruger
Ruger never made a model called the P38.
The SR-22 is arount 2780MPH
You can get a manual for free at Ruger's website.
Go to the Ruger website. There is a section to date your 22 by serial number.