Machiara's Army for Beginners (with Purchases)

I would start with three boxes of plastic archers and supplement them with command groups. You should also buy the boxed set of Glade Riders along with a Champion and a Standard Bearer; Glade Riders are one of the most important units in a Wood Elf army. Grab a Treeman because he's very expensive points-wise and will let you start fielding an army earlier.

You should also purchase the female Wood Elf foot mage; I think she's the best one. Finally, purchase a Tiranoc Chariot for some hitting power (paint it Wood Elf colors, there's a thread on how to convert one on page one of the forum) and a Warhawk Champion for your General. This will give you the following nifty 1500 point army:

(Your General name here)

Wood Elf General w/ 298 points
Sword of Heroes, Golden Crown of Atrazar, Magic War Paint,
Lance, Shield
Warhawk

"Scythes of Loren"

Wood Elf Chariot w/ 115 points
Scythed Wheels,
3 Crew w/
Lt. Armor, Shields

"Riders of the Meadow Glade"

Champion w/ 81 points
Hail of Doom Arrow
Lt. Armor, Shield, Lance
Elven Steed
5 Glade Riders w/ 223 points
Lt. Armor, Shield, Lance
War Banner

"Oakheart" 280 points

Treeman

"(Mage Name)," 181 points

Wood Elf Mage Champion
w/Skull Staff and Rod of Power

"Meadow Glade Crimson Company"

8 archers 135 points
w/Banner of Sorcery

"Meadow Glade Nightshade Company"

9 archers 99 points

"Meadow Glade Emerald Company"

9 archers 99 points