I just picked up a starter on e-bay. Is there enough in the starter to play or do I need to get some boosters or another starter?
Play the starter for a while until you and your players get good...
Then buy some extra pieces to throw in some flair as you like
Download the movement charts, and the beta-rules pdfs to get a good understanding of the game mechanics.
Have fun, and happy dratping
PS Don't waste money on boosters, you'll find plenty of people on geek to buy/trade for pieces!