Khador has lots of great stuff, and its hard to go wrong with just about anything.
Personally, this would be my shopping list if I was just starting out...
Prime: Remix
Khador Box set.
The Butcher
Vlad
10 Iron Fang Pikemen, and the Unit Attachment(Iron Fangs are tough, fast, versitile infantry and can slaugher infantry and warjacks with equal ease)
1 Manhunter(A very good solo)
1 Box of Widowmakers(Elite snipers that annoy the heck out of your opponent).
With that stuff, you got the makings of a good 500pt army. After you have played for a while, get the feel of what you like and dislike, and than make your choices from there.. If it helps, I can do a unit-by-unit rundown of the Khador forces.
Warjacks-
The Destroyer- Great all-around Warjack. Good range attack, good melee attack. Only con is that it is pricey.
The Juggernaught- Great anti-warjack warjack. This guy will wreck any warjack on the field. He is cheapish, and is very effective at what he does.. Killing warjacks dead.
The Marauder- Slam-Machine. Great in combinations with other parts of your army. Slams warjacks around, which can wreck havoc on an enemys battle plan.
The Kodiak- An All-terrain warjack, and runs for free. Very mobile, and has 2 open fists, which allows him to chuck warjacks around. Also has a good special attack that lets him cook infantry near him.
The Devastator- The walking bomb. Has the highest armour in the game, and is damn near impossible for an enemy to kill before he attacks. When he attacks, he can kill a HUGE amount of enemy infantry, and can get deep into an enemys lines. Once it attacks, its armour drops, and it can be killed easier.
The Bezerker- Very cheap, but at the same time, its not very good. You get what you pay for. Needs support if you want it to kill stuff, but can be good with the right warcasters(Vlad and Karchev).
The Spriggian- Expensive, but has alot of bells and wistles to help it out. Has more threat range than other warjacks, and can trample through enemy troops easily.
The Behemoth- Our unique warjack, very tough, very dangerous, and very, very expensive. Is the most expensive model in the game. Has 2 bombard cannons like the Destroyer, and can shred enemy warjacks with its fists, which half the armour of enemy warjacks.
Troops
Iron Fang Pikemen- Versitile, tough, and deadly melee infantry. Rated as some of the best infantry in the game. Its unit attachment makes it even more deadly and tough.
Widowmakers- Elite Snipers. Can slowly dismantle warjacks, or kill infantry regardless of their armour. Very high defense, but very low armour.
Winterguard- All-Around infantry. Sort of a jack-of-all trades, master of none. Doesen't have the hitting power of the Iron Fangs, but are a bit more maneverable. Has a ranged attack, and its Unit attachment makes them more diffuclt to hit, and gives them a sort of "hit and run" ability. Frailer than the Iron Fangs, but still plenty tough when used with other models that support them.
Assault Kommandoes- Tough, ranged infantry. Has a very good anti-infantry ranged attack, and can lay down a withering storm of firepower. Their not out yet, so I can't give you alot of experiance with them, but their stats are good.
Mekanics- They fix jacks, and are dirt cheap. Simple as that. Good if you have alot of warjacks in your army, or play Karchev. If you only have 1-2 warjacks in your army, I wouldn't bother.
Man-O-War Shocktroopers. Tough. DAMN tough. They are slow, and lack punching power, but chances are, they will never die. The problem is, they will probobly never do anything either.
Man-O-War Demo Crew- Still very tough, not quite as tough as Shocktroopers, but they make up for it by being monsters in melee. They wreck anything they get in melee with, be it Warjacks, Infantry, whatever. They are also cheaper than Shocktroopers. If you like Man-O-War, I recommend these guys.
Kossite Woodsmen- Frail, but have a nifty ambush ability that makes your opponent on edge.
Greylords- A great support unit, they can freeze enemys, give you cover, drop an enemys defense, stop charges, or just slaugher infantry with their spray attacks. They are also a key unit to deal with models that can only be harmed by magic attacks.
Morter Crew- Simple unit, they lob morters at your enemy. Great anti-infantry unit.
Solos
Manhunter- Fast, stealthy solo that can wreck up a light warjack. Cheapish and usefull.
Man-O-War Kovnik- Tough, hard-hitting, slow solo that can Jackmarshall. Typically I don't like Jackmarshalling, but it can be usefull in some situations. Very expensive though.
Man-O-War Drakhun- Tough, FAST, Very hard-hitting solo that is tougher than most light warjacks. Expensive.
Kovnik Josef- He is there to support your Winterguard. Gives them special orders that make them better. No point if you don't have Winterguard.
Im sure im missing a few things, just ask if you have any specific questions on any of the models, units or Warcasters.