With Topo Switzerland V2, the PC activation was tied to the hardware of the computer at the time, which is why the program requires new activation after a PC change. It's best to contact garmin.com. As retailers, we unfortunately do not have access to the Garmin license database and cannot issue codes; this is handled directly by Garmin.
No, this product is not intended for Garmin watches, but for the cycling and hiking computers. For this purpose, only routes on the existing paths can be planned.
I think the topo map is only suitable for e.g. Edgar 1030 or similar. I suspect that the memory in the watch is short and the screen is not big enough. Possibly not compatible.