If you are desperate for platinum now. zone into the tutorial and make sure you have the hotkey for open on your hotbar. Open all the barrels and loot the rations and bags to sell. Kill any staff-wielding Kobold (the jail area seems to be the best for drops).
This is all vendor made (instead of baz dependant) plat. An afternoon spent this way can give you a serious bankroll as a self-made lowbie character. Besides, its nice to buy your spells with.
To keep it fresh, take your friend to some different zones in between the TSS focusing (which really is the most efficent route to get levelled and equipped now):
10-15 (--for the experience and knowledge mostly)
Kurn's Tower for the hotzone drops, bone chips and fun of skeleton combat
Najena for some fun times and possible upgrades if you get lucky (but it goes much higher than level 15
The Warrens... just a great zone to learn in and useful faction hits
15-25
netherbian lair is worth it for the +1 regen augment alone (the negative stats are not a concern vs. the availability of regen at low levels in my mind)
King Xorbb's Gorge is a kiter's paradise in the correct level range, and your friend would gain an appreciation for the immensity of the old world (Karanas)
25-40
The Overthere start collecting your sarnak braids for the Worker's Sledemallet early (yes, many can gimp the quest but an sk can do it the old fashioned way).
Warslik's Woods and Dalnir have decent hotzone drops and some potentially useful factions (if you want Demi lich skullcap for the necro and greenmist for the SK)
Crystal caverns is worth getting good at killing in, since once the dwarves trust you it is a self-contained kill-loot-bank or sell zone. Also has decent drops and a good hotzone aug.
Gulf of Gunthak --one of my favourite levelling areas, many camps that range in difficulty and the named drops are decent for non-twinks.
40-50
Lower Guk --I wouldn't kill the good frogs in Upper unless certain you and your friend don't want to do quests there. Lower Guk has great drops and is solid xp. Untwinked you'll need to be careful how you approach it, but you might be ready to try it before 40. Certain drops remain valuable.
Dulak's Harbour --LoY spells quests for most require this zone, it has a good gem drop rate and new hotzone drops added in.
Natimbi -kiters can make a killing here in this range, just don't play with the named turtles. Some random zone drops here are nice too.
50-60 Lots of choices here, and by this point your friend isn't likely considered that new anymore. I would recommend hitting up Old Sebilis and Acrylia Caverns for sure.
Crescent Reach-Blightfire-Goru'Kar Mesa-Blackfeather covers 1-60 very nicely and has some amazing drops. XP seems fast in these zones and you make good vendor trash coin. When I am short 1k for an item in baz I run over to Goru'kar Mesa or Blackfeather for a quick grind, when I want a change of pace I travel the world.
It was great of the OP to join the friend on a new server.