Hi! Welcome to LW! :)
1. Pebbles are the common currency that you can get from daily tasks, selling items in your inventory, and releasing wolves. Moonstones are the premium currency, you can get it by spending real world money, but the achievements give out a good number, and you can craft them from moonstone shards. Moonstone shards drop randomly from most of the professions, and 10 shards can be combined into 1 moonstone. As for which to focus on, it kind of depends on your goals/play style? Moonstones are used for the rarer items/companion and are involved in a lot of player to player transactions, especially custom apparel, while pebbles are used more in smaller day-to-day stuff like getting food from the mole market.
2. In addition to breeding and buying wolves from other players, there are also wild wolves! They're g1s that can be found rarely in the campaign. If you encounter one, there's a low chance to recruit them. If they don't join your den, they drop a knucklebone token. If you get 50 tokens, it unlocks a wild wolf hunt in the hunting profession that is guaranteed to give you a ww. There aren't any ways to customize colors, but there are 2 color randomizing items: the besprinkler that randomizes all the colors and the eye besprinkler that randomizes only the eye color.
3. The daily activities are a good place to start! You get pebbles for doing them and they're a pretty good way to get used to the different site areas. The achievements are also pretty useful - there's a section specifically for new players, too, that's helpful for getting acquainted with the site! :)
I hope this was helpful, and if you have any other questions feel free to ask! I also hope this wasn't an information overload - I'm still in informational writing mode from my job lol
