JUst a little hint on removing the buttstock. There is usualy a felt washer on top of the buttstock bolt to keep the oil bottle from rattling. Unless you use a bent coat hanger to hook it out, you will NEVER get a screwdriver in the slot to remove the bolt.
I will second that bit about screwdrivers, anything from the hardware store will only bugger the screw slots. You need a set of gunsmith screwdrivers that are hollow ground instead of chisel tipped. Easiest is a set with one handle and interchangeable bits. You can fudge a bit with the buttstock bolt since it has a wide, instead of narrow slot in the screw. I have found that a 3/8ths ratchet with extension bar and a socket with a LARGE screwdriver tip to work well because of the leverage the ratchet handle allows.
As others have stated, boiled linseed oil was what the factory used so that is hardly bubbaing it. If the stock is dirty, you might want to clean it first with the same stuff you would use on frurniture.