Hey Luca. I'm new around here but in researching for my own upcoming project I did run across an answer for you on your questions. To my untrained eye it appears that you are set.
As for the VCR, with a quick search (I'm on the NTSC side, not PAL) it is comparable to the Panasonic AG-1980. That's a great thing if it is in full working order.
The external TBC comes highly rated as well.
As for the capture setup; I gleaned a lot of information from this forum thread if you have yet to see it.
Specifically post #35 had a few answers for you.
"You have to use Windows XP x86 (32-bit)
. No x64, no Vista, no Windows 7. If available, I suggest using Windows XP Pro SP2
. Not SP1, not SP3. Not Home, not Media Center Edition (MCE). Windows XP Pro SP2 is the most stable version of Windows XP. (SP3 is also stable, but adds a bunch of online "security" crap that's not really essential to a system built for video capturing. You'll have to disable most of it, if you do use SP3. Otherwise it may tank a capture with silly warnings and nuisance pop-up alerts.
As for the drivers I'm sure you'll get most of the answer you seek in that thread I linked. Good luck and happy capturing!