minimum usage degreaser on your engine bay for starters, wash the engine with soap and keep it running so nothin earths out. then polish all the paint inside your engune bay..thats what i did.And regular polishes every 2-3 months.
as far as mods go purchase a full 3inch turbo back exhaust, get some nice rims and lower your car. then if you want to boost it up follow the sticky trhread in forced induction performance.
good luck with your new car mate