Very few shops sell lacrosse equipment so usually the best place to purchase is online. More retailers are available in the US with greater choice but be aware you may be stung for import taxes if you purchase from one of those sites and obviously delivery charges will be higher.
N.B. Not all lacrosse sticks are approved for international use, it is best to purchase one that is. The list of current approved crosses can be found on the FIL Website.
If you are just starting out you will need a stick, mouthguard and (football) boots. Gloves and other equipment is optional.
Please see below for a list of retailers selling lacrosse equipment.