So i was thumbing through arsenal, and noticed that it didn't list the types of ammo available to vehicle weapons, namely the cost. Is it just the standard ammo variety? if i'm just blind a referance to the info would be helpful also.

They all depend, though you're right it's not listed right there. Some of them are in the Compiled Tables at the end, whereas others are common sense: the lasers use peak-discharge cells or vehicle power, the rocket launchers use rockets, the glop gun uses freeze foam, etc. I'd honestly have to look up the Light Cannon, Autocannons, and stuff, but it's probably just Assault Cannon ammo, and HMG ammo?