The word itself tells us something about the ability, while the rest of the description of the ability tells us everything you need
The Revived Sky God is one such example with it being a Trap Card that lets you summon Slifer from the Graveyard and then both plays draw until they're holding six cards in their hands (y'know, like how Card of Sanctity works in the anime
Syr Gwyn makes all those expensive equip costs of cards like Colossus Hammer and Kaldra Compleat cost nothing
So first things first: When making a new deck, how many of each card should there actually be in your deck
If you want to learn more about the different type of cards and what everything on them means, I highly recommend you download and play the official Pokemon Trading Card Game Online, even if only for research purposes
Prices of specific cards in Bloomburrow are expected to fluctuate post-release, but listed figures are a good starting point