Due to the humidity and heat you will sweat allot so take plenty of water.
Also you will need to wash everything except your shin guards and gloves after every session so you will need at least 2 of each item so they have a chance to dry. Gloves and shin guards you can get away with washing just once a week.
I’ve found it cheaper to buy my equipment over in Thailand and it saves the hassle of bringing it all over with me. Tiger Muay Thai offers everything you need in their store though there are plenty of other stores near by you can buy equipment from also.