You can get sample rules, and scenarios that only require the sample rules, for free download at
the Rattrap forum.
Stock table size is 2 feet x 2 feet (we've played on as big as 5'x9' for a few really gonzo scenarios); force size is variable but 2-6 per player is normal; game length is usually under 2 hours but variable depending on size & complexity of the scenario.
There's a full 2nd Edition coming out sometime Really Soon.