1. So ignore my previous answer that I gave you because I got it slightly backwards, so here's the real one!
Enchanted items match up more to the spell that they're enchanted with in terms of cost (assuming they're permanent enchantments). So for example, something that grants use of "Shield" or "Invisibility" is going to be more expensive than "Animal Friendship" or "Charm Person", and this is generally because spells with application to PVP are going to be more valuable than those with social uses (or very creative PVP uses, I guess, haha!). There are some caveats here, such as a very reduced cost if the item is a one time use rather than a permanent enchantment, so that's a bit on a case by case basis. But to continue the example, a one-time use of Shield would be one token, and the social ones would be free. More permanent items still have a cooldown to prevent "spamming" of skills, but they would essentially recharge on their own is the idea.
Also for the specific good luck example since that's a more nebulous application, it might be helpful for Matt to find that it doesn't quite work without a more specific direction for the spell. So if Amos and Tezca wanted better luck in the form of accuracy with their guns (one of these two needs it more, sssh), that might cost a token, but if he was giving them better luck at not stubbing their toes on That One Table That's In The Way, that would be free.
Essentially, things cost tokens if they're intended to be explicitly used for PvP or PvE, but if it's just for general flavor, those are fine to hand-wave. Or similarly in a specific example here, if the receiving player doesn't intend for the charm to be used for a combat application, that's also fine to handwave (Tezca isn't allowed to be good with guns because I said so, basically). We'd revisit this if it's abused, but I doubt it would be!
2. Straightforward by comparison! If a character already knows the spell, no need to have them relearn it/spend the tokens. The spells in the spellbooks all come from Dungeons & Dragons, so we expect there to be overlap since there are a lot of very common fantasy spells there. The cost only comes into play when learning a spell for the first time (save for Harmonization, since those are free).
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Enchanted items match up more to the spell that they're enchanted with in terms of cost (assuming they're permanent enchantments). So for example, something that grants use of "Shield" or "Invisibility" is going to be more expensive than "Animal Friendship" or "Charm Person", and this is generally because spells with application to PVP are going to be more valuable than those with social uses (or very creative PVP uses, I guess, haha!). There are some caveats here, such as a very reduced cost if the item is a one time use rather than a permanent enchantment, so that's a bit on a case by case basis. But to continue the example, a one-time use of Shield would be one token, and the social ones would be free. More permanent items still have a cooldown to prevent "spamming" of skills, but they would essentially recharge on their own is the idea.
Also for the specific good luck example since that's a more nebulous application, it might be helpful for Matt to find that it doesn't quite work without a more specific direction for the spell. So if Amos and Tezca wanted better luck in the form of accuracy with their guns (one of these two needs it more, sssh), that might cost a token, but if he was giving them better luck at not stubbing their toes on That One Table That's In The Way, that would be free.
Essentially, things cost tokens if they're intended to be explicitly used for PvP or PvE, but if it's just for general flavor, those are fine to hand-wave. Or similarly in a specific example here, if the receiving player doesn't intend for the charm to be used for a combat application, that's also fine to handwave (Tezca isn't allowed to be good with guns because I said so, basically). We'd revisit this if it's abused, but I doubt it would be!
2. Straightforward by comparison! If a character already knows the spell, no need to have them relearn it/spend the tokens. The spells in the spellbooks all come from Dungeons & Dragons, so we expect there to be overlap since there are a lot of very common fantasy spells there. The cost only comes into play when learning a spell for the first time (save for Harmonization, since those are free).