Weapons teams don't feature in the main rules, although there are some optional rules for them if folk want to go a little off-piste.
Mortars can be used in the firebase scenario: I'll probably be going for standard 3x3 cm bases for those.
I'm using 2p pieces [the newer ones that are magnetic] for both Communist and "White Star" (western) forces, with some Screwfix washers (a little smaller than a 1p piece) for casualties, caches, peasants and VC ambushers [i.e. on the cache loop].
Hope this helps - others may be taking slightly different approaches.