First off, how are you putting with the starter? If you are doing fine with it, I suggest holding out on a putter for now.. I have seen two or three players at master level crushing the greens with the starter.
Personally, I would have spent 50 extra credits on the WGT Tour Pro 9.5 driver, as it has an extra 15 yrds. The faster swing meter may be intimidating at first, but you are going to have to get use to it down the road with some of the irons and drivers (if and when you want to take your game to another level).
I definitely agree with the above poster, wedges! I suggest the z-wedges for the price, and if you can hold out without until level 38, I would wait for those, getting the 52 degree and holding out one more level to 38 for the 64 degree ones. If you don't feel like dropping a little over half of your credits, go ahead and get the two from lvl 14.
If you aren't looking to drop some money into the game for a while, or are undecided, don't bother with trying to get an iron set.
^all of this is JMHO.