lots of options....firstly.. thought id tell you before someone else does.... try to avoid the text talk as people dont respond to it too well
and you can find loads of info by using the search button... very useful!
For 2k you could probably go for a KO3s upgrade, with any luck you could see 230-250bhp depending on quality of mods and the map you get.
You'll need the turbo itself £150-250 depending on age and condition
Front mount intercooler(FMIC) anywhere between £100 for laguna one or £700 for a forge one,
Forge dump valve £70
Forge TIP £100
Turbo back exhaust £500 ish
Remap £500
4bar fuel pressure regulator £30-£40 i think
Should also consider coilovers and a break upgrade.
All this is prob about £2k
Hope this helps
Sure someone else can point out other options or if i said anything inaccurate