6 Caesar, Legion's Emperor They're Disposable Attacking is all Caesar, Legion's Emperor, cares about and for good reason
Even in BO3 formats, youre not required to submit a deck with a full sideboard
Your deck size is 60 cards
Town and gate have no inherent rules text, and they just exist as land types for other cards to reference
1 Foil Rare or Mythic Rare that can have any treatment such as extended-art, borderless, retro framed, double rainbow foil serialized Eldrazi, foil-etched, traditional foil Special Guests, textured foil Special Guests or Double Faced Flip Planeswalker 4 Foil Commons 3 Foil Uncommons 1 Foil full art Basic Lands 1 Retro-frame common or uncommon, or full art Snow Covered Wastes 1 Foil retro-frame common or uncommon, or full art Snow Covered Wastes 1 Foil token While Wizards of the Coast has an in-depth breakdown of collector packs, and different treatments this should help you get an idea of what you can find in the pack