Two questions about Ultimate Adventurers

Nope. It can be any job.

Hat - 7 all stat, 50 def/mdef
Robe - 3 all stat, 20 HP/MP, 60 def/mdef
Gloves - 2 all stat, 24 def, 5 mdef, 15 MP
Shoes - 2 all stat, 35 def

 Set Bonuses

4 set bonus
HP: +100
MP: +100
Physical Defense: +50
Magic Defense: +50

5 set bonus
AllStat: +6
Weapon Attack: +5
Magic: +5
Physical Defense: +100
Magic Defense: +100
Speed: +20

Weapons are obviously all different. And the medal (not part of the set) gives 200 HP/MP, 2 att/matt and 10 speed/jump.