The emblems on the 2000 Toyota Celica are fairly easy to remove. Get a hairdryer or a heat gun and heat up the badge, which will soften the glue underneath. Then use mono-filament fishing line, dental floss, or something of the sort that will fit behind the badge, and use it to cut the glue loose from behind the emblem. This way you won't scratch the paint or cause any dents. To clean up, heat up any remaining glue and remove, and wipe down the surface with a paint-friendly spray cleaner, such as Meguiar's Quik Detailer, and a soft cloth or towel.