I think another 11 (section leader, plus two fire teams of 10) and a Platoon command section (LT, Sgt and Medic). I might add a HMG or light mortar too, if I can find a suitable model.
As for vehicals, well I have just picked up a couple of the die-cast James Bond T-55 MBT on eBay, and am bidding on another. These will be jolly hand as they are used by the Nigerians and the Finns
. I also have a Saracen APC from Britannia Miniatures off a fellow LAFer quite cheep, and I believe the Nigerians still use some of those too. Other than that they will have to go by trucks. I have a Solido Unimog they can use.