I would figure out how much all the parts you are going to need will end up costing before you sink too much money in to the project. Parts can start to get expensive quickly when you buy them a la carte. You might start buying parts only to realize that you could have spent a little more for a new, or quality used bike with better cromoly or aluminum tubing and updated components. Restoring an old rig can be rewarding, just be careful not to let it turn in to a money pit, I probably wouldn't spend more that $75 on a bike with high tensile tubes.