There is a warp for mobs and animals. Can you go mining? I am wondering because people are trading pick axs.

 

No, you are not able to go mining.

Pick Axes are part of Donor perks and kits. You may use them for cobble gens (Or other gens.) Iron and other ores are able to be bought from other players for grass, diamonds, etc.

 

Moved to help since this is more of a one sided question

But yes, as Star has said, theres no where to go mining. They are mainly for cobblestone generators or just breaking stuff that needs a pickaxe.

 

You make a cobblestone, smoothstone, or ice generator, and those items are the most common ones mined with a pickaxe. There's plenty of tutorials (or just ask here) if you are wondering how to make one of those!