Hi and WELCOME TO THE FORUM!!:wave:
Have a search int he Grande Punto Section, this has been covered a few times.
The "punto" is simply stuck on the rear and comes off with a hairdryer. The Fiat badge at the rear requires more work as there is a hole/indent that will need filling.
The badge at the front is removed by repalcing the whole grille with a badgeless one.
Hope that helps,
Alan