That early there aren't many options. For a melee character the best armor that early is gold/platinum, or maybe the new version of the ninja armor, unless you feel confident enough to farm the EoW and kill at least a few parts of it to get demonite and shadow scale.
For melee weapons, anything that can attack from a distance will be useful, like boomerangs, the thorn chakram, a good yoyo or enchanted sword or starfury.
For a mage definitely get a jungle armor, and you can be lucky enough to get a vilethorn from a shadow orb or the new desert staff. The vilethorn is perfect to hit the eye as it transforms, since it's not moving for a few seconds.
Also, build a big arena with several long platforms at different heights and use the grappling hook to move quickly between them.
And if you were lucky enough to get a flinch staff or slime staff, a summon each will give you a slight advantage.