2009 Honda City needs service after every 10000kms or 6 months, however if your usage is quite low you can even take it to service once in a year. So, if you already passed a years time or 10000kms from the last service, your car needs a service or else you can wait for the right time.
Certainly, you can get your car modified as per your choice. Coming to the front grill, you can replace it with the different grill. For that, we suggest you to get in touch with the authorized service centre as they will be the best people to suggest you few compatible grills to choose from.
Click here to find the Honda service stations by selceting your city in the drop down list.