Rulebook states, that food cards boost a specific skill. When I activate my tumble skill, I have the boost (for example +2 from Swiftgrass potion) and can tumble 3 spaces (1 naturally + 2 from potion). Do I have for my second skill also 3 movement or only the natural 1?

Food cards apply only to a skill you TARGET (hence the skill icon in the top right corner of the card). therefore only the skill you assign the “boost” from the card too has additional movement range. Other skills are limited to your normal movement range (how many move icons in your upgrade track). Only if the card specifically says “all skills” do all skills receive the boost.

How does Transbobulator work?

You may only activate the ability associated with the colour of crystal on this item (which also means it does nothing in scenarios with no crystals) You target any token on the board (with range) and move it to a new space within the range indicated by the ability which is active.

How many cards do I start with?

Unless specifically instructed by a given scenario, you begin the game with zero cards. Your first card will be acquired at the end of your first turn during the Exploration Phase.

Can I play any kind of card in phase 1?

All cards can be played during Phase 1 and/or Phase 3. However, if a particular card adds to your movement or effects the board in some way you wish to take advantage of during your movement phases (Food and Rune card) then the card would be wasted in Phase 3 since you would have already ended your movement.