Conan

Yes — when enemies are equal to or outnumber allies in an area you suffer hindering: affected movement steps cost extra movement (see Hindering Movement, page 17).

Yes — hindering can cause you to ignore die symbols on a roll; the rules explain which symbols are ignored and show examples of how to apply this (see Hindering die rolls, page 18).

Use the Guard action to protect an adjacent ally: if you successfully Guard, attacks targeting that ally can be resolved against you instead, using your defense and armor as described (see Guard and Armor, pages 11–12).

Yes — encumbrance from items or skills can impose movement penalties and affect how one- versus two‑handed weapons interact with skills; check the encumbrance and movement penalty rules for how these apply (see page 19).

Manipulation actions (pick up, throw, open chest, etc.) are subject to hindering unless a rule says otherwise; the Reroll action has a specific hindering exception explained with an example for opening a chest (see Manipulation and Reroll, pages 13–14).

Ranged attacks require line of sight to the target, and elevation can grant an attack bonus for ranged attacks when the elevation rules apply (see Ranged Attacks and Elevation, pages 10–11).