I strongly suggest you get a couple of Kalmbach’s beginner books (under “shop” on the menu bar above).
The NMRA’s beginner’s guide might help http://www.nmra.org/beginner/
Check out the “Articles” under “How To” on the menu bar above.
The following tools are what I used for benchwork for my current layout (benchwork complete, track laying:to begin soon).
Safety glasses.
1/2" drill (3/8" drill will work also) - mine’s cordless, but corded will work just fine.
drill bit and counter sink combo for #8 and #10 screws.
Pocket drill with Philips screwdriver bits - this is optional, you can use a screw driver or the drill above, it’s just handier not to have to swap bits…
handsaw - I like the Japenese style pull saws
tape measure
combination square
miter box for square cuts. To get the same length when cutting - clamp the miter box to a 2x6 and then clamp a piece of wood as a stop along the 2x6
clamps - At least 2, I like the quick clamps you can operate with one hand.
saw horses - At least 2 (I used 4), I hate working on the floor. I also had a workmate, but that’s not required.
Wood screws, Phillips, stainless steel, #10, 1 1/4" and 1 3/4" . Use the longer ones when screwing into end grain. I used a plywood top and used #8, 1" long screws for fastening the top to the benchwork. Zinc plated will work if cost is an issue. Some people like drywall screws, deck screws, or sheet metal screws, but they are all inferior to wood screws for benchwork (unless you are using steel studs then sheet metal screws are appropriate). I would not use nails for benchwork
I had the plywood cut for me at the lumberyard
Do not use glue, since this is a first layout you’ll most likely be building another one down the road and you can salvage the wood and screws from this one.
For laying roadbed and track.
I use flex track