Class 66 bobbins along with regular 15x1 needles are correct. I'm not sure if model 66 slide plates work. They're available as reproductions. Sew-Classic.com should have them along with good quality bobbins. Jenny at Sew-Classic has a great reputation here and should know if the slide plates fit your machine.
New Singer branded bobbins that are available at chains like Joann's and Walmart are narrow at the rim and while they work in the machine just fine, they don't always work with vintage bobbin winders.
Congrats on your new machine!
Rodney