1) Wrapping of food - foil, greaseproof paper, clingfilm, other?

2) Lining a baking tray - baking parchment, foil (normal), foil (expensive non-stick), greaseproof paper, other?

3)Freezer bags - zip lock or those that you push together, other?

4) Washing up - brush, scourer (yellow thing), brillo pad, j-cloth, other?