Hoi, and welcome !
Advnt Coupon gives u 50 gil

All mobs have had levels increased recently, so this might be the case that ur only level 5.. Others must comfirm. Havent tested starter area since last update.
Dont buy spells on AH unless ur rich and want the spell ASAP. Search up the spell you want to buy on the wiki clopedia. And hunt down the npc that sells em.
To get started with money , start farming and check prices at a NPC, if the sell is more then AH , then NPC it. If not put it on AH(if it sells there, use the Auction House link above).
It takes time in the start, but you will get there. Also little tip, look up quest rewards, and start doing quests (for fame) for rewards you either use urself or sell on AH for profit.
Gl !
And if you dont have it yet, shout for MogHouse LS pearl in any starter city. Server wide Linkshell.