On a quick glance, that set seems like a simple re-boxing of various Italeri plastic kits released in the past. Not sure how much you would save compared to buying the contents individually.

As for rules, there are plenty of rules out there that should work with the forces included in that set. Besides the previously mentioned Bolt Action, other sets that come to my mind include Rules of Engagement, Rate of Fire and Battleground WWII.

Edit: speaking of Italeri, at some point they had a set of WWII rules (called Operation Overlord I think) out on the market, but I haven't those in a while.