but seriously you might be better off asking the tint question in your local forum because every state has different laws, not to mention some towns in each state may be more lenient than others.
i paid 250$ for my tint. i have 20%. i know my friends paid as little as 120$. once again it depends on the area, the type of film and if there is a warranty on the work.
as for mods, jsut go in the 08+ thread, the gr sti thread and out 2011+ thread. look through it and search. so many pictures. also try the interior modification forums. without being specific people will not really just post stuff in here.