Get a copy of Using The View Camera by Steve Simmons. 4x5 is the less costly and probably the most versatile of large formats, but is 8x10 has hold of your passion don't think that you have to start with a 4x5. You can put a 4x5 back on an 8x10 camera and make your mistakes with less costly 4x5 if you want. Probably the less costly 8x10 cameras you'll likely find are Anscos, Kodaks, and metal Calumets. Film holders are pricey even used I like the black wood ones marked Graflex Made for Eastman Kodak. Plastic Lisco Regals are usually pretty nice as well. Buy a stack of them from a reputable dealer so you can exchange any "leakers" For glass plates you'll need plate holders which is a different sort of critter---you get them wherever you find them (often at antique fairs) Your best bet is taking a workshop to learn the techniques---Photographer's Formulary usually offers a few every year. I think Bostick & Sullivan still do also.

Have fun!