yea 250 isnt getting a good suspension. It will get you a set of springs but not shocks. and other then TRD or the equivalent eibachs (same spring different label) which are .8", you will need shocks to compensate for the drop. So if your that strapped get a set of eibach pro's (i think are the . and put them on your stock springs. it will be noticable but cheap, i think around 150 on ebay)

Other big issue is there is not enough clearence room for the celica to use spring clamps. if you look up in the wheel well the sping itself goes higher up in a tight space. this would in most cases not fit the clamp. Since i have had the celica i have never known anyone to have spring clamps on a 7th gen, or atleast none that admit it