Tawantinsuyu: The Inca Empire

Yes — Roaming and Descending require you to pay the food cost shown, and each built Step reduces those food costs as specified; Steps also grant VP when built (p.9).

You can place more than one worker and adjacent workers increase the number of tasks/resources gained (adjacency bonuses apply); follow the space’s icons for any stacking limits or special distribution rules (pp.9–10).

Passive buildings provide their listed effects when you use their placement/action and remain as passive effects, while a Production building’s “Produce One” action gives its benefit and the production building is then resolved/flipped as described (pp.12,16,19).

In 2‑player Conquest you play Army cards and follow the flip/discard soldier steps, place the conquest marker, and immediately receive the VP and region rewards listed for that conquest (p.15).

Festival scoring awards VP in the listed tiers (1/2/4), resolves merchant/Temple/Conquest scoring and other festival effects, and applies potato penalties (negative VP for leftover potatoes) as specified during the Festival resolution (p.17).

You cannot exceed the 2‑worker placement limit and worker purchases occur at end of turn (subject to the recruit cap), so newly bought workers are not available for actions until after purchase resolution (pp.16,8).