[Astorax]

Every character starts with 100gp. You may automatically have some items such as a Wizard automatically having 1 Spellbook or a Cleric automatically having 1 Ritual Book. Everything else, look to page 210-ish in the PHB for equipment and their costs. I suggest atleast a Standard Adventurers Kit + a weapon and armor. If you are a ritual casting class, perhaps some Ritual Components as well. Also, Wizards will probably want an Implement as will a Cleric (Holy Symbol).