http://www.gotwheelsandtires.com/catalog/product_info.php?manufacturers_id=65&products_id=470

that site shows the wheels that i'm looking into getting
but what does the offset/pattern mean

my tC has no lowering or anything and i'm not sure what offset/pattern will go with it
can someone help explain to me what the offset and and patter are?

Your pattern is 5x100 and stock offset is +45. Read this to understand offset (http://www.tirerack.com/wheels/tech/offset.htm). Read this to understand bolt pattern. (http://www.tirerack.com/wheels/tech/boltpatt.htm)

thanks