Thanks for the replies! I had a distinct advantage after receiving that first set, which would cause my mother to roll her eyes and smile when my father and I jointly announced that we were going to Lopo's Camera and Train Shop after dinner, or, on the weekend. That was because my father was a huge camera buff, both 8mm movie, and 35mm still. So, I didn't have to do much arm twisting to get him to go to the train store! He needed camera supplies regularly, and, a place that repaired Cameras. Lopo's was perfect for both of us.
As to that bill dated Dec. 5, 1960, it also lists:
1 #3672, and,
Another bill, dated, "12-13 1960 lists:
1/2 Dozen Power,
10 Super "O" Track,
1 Book, and,
1 roll wire Lionel. (I still have some of that wire. I used to roll it around a pencil so the length would be varied. The practical result is that the cut wire didn't take up much space, and was saved by my parents with the trains.
Another bill, dated, "9-14 1961" lists
"1 pr. Super O switches", and
This bill was dated near my birthday, so I suspect the switches were a birthday gift. I do recall that my first 5' X 9' layout ultimately would have a pair of switches, which I also still have.
As a side note, my best friend in grade school had moved north of the city into a new subdivision about 2 miles north. I went to spend the weekend before Christmas, 1960 with him and his family. A few years later, my parents told me that they set up and tested out the train set that weekend, so there would be no operational surprises on Christmas morning.