just a note on some of the things u might of considered
bumpers r easy to fit ie 4 bolts for rear n a handful for front so dont let a garage or such rip u off...if u dont mind getting abit dirty then i say get under the car n go at it urself (no pun or such intended incase some of u read this different lol)
splitters u should b able to find a million threads like mentioned above but its up to u if u like them or not...
alloys they vary to ur likes n budget so ur bound to find something u like n im sure u could change some wheels or if u have a bf get him to do it

lol
depending on the suspension they aint hard to fit either garages usually charge like £15 per corner
tints werent mentioned but mixed reactions on these but with them being ilegal on the front many ppl dont bother if u can do them urself u saved urself loads of money but chances r u aint so good tho
meshing i havent tried it yet but many people on here have had quite some success so it shouldnt b too bad a garage shouldnt charge u too much £25?(only guessin here)
exhaust if its just a backbox u got its unlikely u can fit it without going to a garage i aint sure on the rates for fitting these days
i recommend removing the bump strips its much better than colour coding imo n is cheaper
door handles u got choice of colour coding them or chroming them out
i would of offered to help to fit some of these for next to nothing but my girly wouldnt b very happy with another girly coming here so thats a no no lol well have fun modding ur car