DragonKing: Yes, there are lots of "War Gaming" pieces around, my son plays Warhammer which he got from Games Workshop and I am sure there are some pieces there taht could be used.
DragonKing: I have never seen the game for sale but that does not mean it isn't ... this is one Fencer had here from the start of the site, not sure where he found it. I would expect that if you could make the board it would not be hard to fnd markers which might be used, could be checkers with a double stack for the Commander or "King" tank for instance.
WRT to the pink square, only the Commander can land or pass through them and they are all safe (that is one Commander cannot take another Commander there).
Okay .. perhaps you have identified a couple of areas where the rules may need some further clarification .. but to answer your questions ...
A tank cannot move to or over balck squares (mines).
It is true, the following stops (blocks) the movement of your tank - a friendly tank, a mine, the pink squares (unless it is the commander), or a enemy tank. Of these obstructions, you may only move to occupy the square of an enemy tank (unless it is the enemy commander in the pink squares).