v2.2 and therefore Normandy is not out yet. The team is still working on it.
Suppy trucks look like normal trucks, but with a bunch of boxes in the back. They also don't have tarps, and can only hold 2 people.
Commander deployed boxes are parachuted in by the commander. They look like the normal BF2 box, a square with rigging tight around it.
To deploy said box, be the commander and find a radio, hit caps lock, then select the SUPPLIES button and select where to drop it.
The infantry ammo supply kit is a pickup kit on some maps that looks like a rifle leaning on a box. Pick it up, select the box, and drop it next to whatever static gun you want to resupply. I also have no idea if it can supply vehicles, so you could give it a try.