Money
/balance— what you have. You start with $250./pay <player> <amount>— no fee between players
Homes and travel
/sethome <name>— you get three/home <name>·/spawn·/warp/tpa <player>— ask to teleport to someone/back— return to where you last teleported from, or died
Teleports take 3 seconds to charge and moving cancels them, there is a 5 second cooldown between them, and you are invulnerable for 4 seconds on arrival. That last one is deliberate — it means you cannot be spawn-killed on landing.
Talking
/msg <player>— private message