Prolly you might wanna do a full service since the mileage is abt 12K ++ as the bike is due for a full service after every 12K-15K..
As for metal plate on floor board, prolly u might wanna try asking the scooter shops at kallang like future, taihin or sunrise.. Price wise not to sure.. Need to ask them...
In terms of best place to do a full decal, its hard to say coz people got alot of preferences in terms on places to do a full decal on bike. So need to experience it first hand. Got a few places prolly u might wanna check at advertisers board..
Suspension wrap u can get ard 35-40 bux at auntie shop depending on the design...