Alright, done some research and this is what ive found.
First: For pong 60. I tried to get it to run with D-box (soooo much simpler, thank you for the find) and I received an error. So I decided to actually try just dos box and see if that would change anything. On the dosbox.com website I noticed compatibility which I clicked on thinking it would give more info on possibly running on windows 7 64x (which ive had troubles just because its 64bit before). Instead I discovered that it was a list of compatible games. So I clicked on P for Pong and scrolled down the list. Pong60 is not listed but THERE IS a Pong V 6.0. My thoughts are that the Pong60 = Pong V 6.0. Either way its listed as broken which means that dosbox will not emulate it. So unless you have a very old pc or run a virtual machine (not a bad idea for this site) your kinda out of luck for pong. Thats what I gathered.
http://www.dosbox.com/comp_list.php?letter=P Second: For the odyssey.tap file (I believe thats the one you have) I tried about 8 different emulators, from this site and from others, and the best I could get was this on the WinVICE-2.2-x64.zip emulator. C64. This is the farthest I got:
C64 (1).png
When I hit the space bar like it says all that happened was it sat at this screen no matter how long I waited:
C64 (2).png
So I believe I answered your first question as best I could but I dont really know much about the commodore (yet) and so my knowledge on this topic is quite limited. Perhaps another member could either confirm what I did or provide more.
Cheers Mate