Jonesy89: Toro: Half-Orc (or something to stand in for Minotaur) Barbarian
Pump your strength, equip big two-handed weapon, and go to town. Barbarians are easy if you're happy with that. The only thing I might consider is multi-classing two levels of fighter for extra feats. Equipment-wise, you'll probably want to use a glaive or another two-handed reach weapon. When combined with the "enlarge person" spell it makes for a whirlwind of destruction.
Feat-wise, combat reflexes, power attack, cleave, great cleave, improved critical, improved initiative, iron will, and blind fight are all good choices (roughly the order I'd prioritize taking them). Your attribute priorities are STR > CON > DEX > WIS > INT > CHA
Jonesy89: Rakeesh; Human (or whatever else works; not like there is a close equivalent to Liontaur XD) Paladin
Just be mindful that ToEE is really hard on Paladins. Got into a friendly drinking game?
You fall.
Paladins are hard to build, so I'd recommend rolling until you get a good result. Minimum scores would be 16 strength, 14 constitution, 14 wisdom, and 16 charisma, and you would prefer a higher intelligence/dexterity score if you can get it, and "higher is better" is always true for strength and charisma.
Aside from that, there's not a whole lot else to Paladins. There are no good feat options or multi-class options available to them. Aside from "improved critical" in a chosen weapon at the 9th level, and maybe getting cleave and great cleave eventually, there's not a whole lot of good feat selections for them.
Jonesy89: Keapon Laffin; Gnome arcane caster (still on the fence between Sorceror and Mage)*
Either Sorcerer or Wizard would work well. If you're going the Sorcerer route, then spell selection is critical. Character-wise, Keapon should probably focus on throwing around spells to incapacitate his enemies. Confusion is a particularly nice one. You'll need to pump charisma to maximize your success chance, however. Select damage-dealing spells sparingly. With metamagic feats, you only really need to know one or two damage-dealing spells. Ensure you diversify with spells to aid your party members; you will eventually run into monsters with spell resistance, and the only way for your Sorcerer to harm them will be to buff his allies. The "haste" spell is a particular gem in this regard.
If you're going for a Wizard, ensure you play a specialist wizard. The extra spell slot at every level is invaluable, and far exceeds the value of a small increase in your spell diversity. Just remember the iron rule of specialist wizards:
never oppose conjuration or transmutation. Observe that rule, and you can pretty much pick opposition schools at random and you'll come out ahead. Given Keapon, an Enchantment, Evocation, or Illusion specialist seems appropriate. A Necromancy/Abjuration opposition would therefor make most sense. Abjuration can be a little risky to give up, but if you have a party Cleric then that can cover for the shortcoming.
Jonesy89: Erana: Half Elf Cleric (kind of up in the air on alignment, but I understand that has some restriction on deity choice)
I'd place her in either neutral good personally, but any good alignment would be appropriate. One thing to be mindful of with spellcaster Clerics is that they get rather few spell slots. If you don't actually wade into melee with a weapon (which is antithetical to Erana's character) they either must be very subdued in combat or else they will expend all their daily abilities quite quickly.
Clerics make the best crafters in Temple of Elemental Evil, so the craft wondrous item and craft magical arms and armor feat are highly recommended. Ensure you take the "good" domain.
Jonesy89: Elsa von Spielburg: Human Rogue
I would
strongly recommend multi-classing Fighter. At very minimum, one level for weapon proficiencies would be a huge benefit. Beyond that, it depends on what kind of fighting style you're going for. There are lots of ways to build a Rogue.
Jonesy89: *Might swap out with Katrina; Human Mage
Evoker, Enchanter, or Necromancy specialist would all make sense, but opposition schools are tricky. Illusion and abjuration seem to be the only sensible options here while staying true to the powers she's supposed to have and still picking sensible options.