You first should get to a boxing club/gym and find out what they suggest. Here in the States if a guy wants to start boxing and joins a club much of the equipment is already there to be used with the exception of hand wraps, trunks, shoes and mouth guards. The clubs around my part of the world have protective cups, gloves for sparring and bag striking, jump ropes and of course heavy bags, speed bags, uppercut bags, etc.
I dabbled in boxing many years ago and all sparring was done in 16 oz. gloves, but that is not what you'd be using if you were to be matched up with an opponent in a sanctioned bout.