Leave him alone you two, he's new.
ATS cups have been done to death on mk1s and so have Ronal Turbos and if I had the choice I would go for Ronals. I got a fairly cheap set of spring and shocks from Euro Car Parts and they are sound, it's called the Streetline kit if they still do it. It's got Bilstein gas shocks and Ventura (they supply springs for Eibach apparently

). It cost me about £120 about 18 months ago and it gives a 40mm drop. If you want a good static setup as opposed to coilovers then Eibach springs and koni shocks are ruputably a good combination.
A full exhaust system from the manifold back is going to cost as the manifold and downpipe will add to the cost. I've got a powerflow on mine from the downpipe back and that was expensive enough.
As for other tuning mods, it's up to how much you want to spend as you could put in an engine conversion if you like, but start off with a K&N panel filter and an exhaust for now, then look into other mods. I think you can do almost anything, it depends on how big your pockets are. I'm not sure if you can do this on k-jets, but a 2ltr bottom end seems to be a good mod that gives you a load more torque.

After that then I guess you could put another cam on and maybe even bore it out. Get your cash out !