I can give you some answers, I own one.
Well, fuel consumption it depends. Currently I am driving about 20 km per day, full tank around RM70.00, last about 350km. Previously my office is quite far away, doing 50 km per day. Full Tank will last 500km

For service you can goto Glenmarie Nazim Peugeot in Shah Alam, Kheng Soon Service in KL. Check out this forums,

Autoworld Peugeot
http://www.peugeotclubmalaysia.com/

A few things to consider,

1) if you are preparing to buy this car, you should prepare pay more for maintenance. It will be more expensive compare to say Proton or Toyota. Also not many workshops know how to repair.

2) 206cc although is a four seater (2 + 2)  it is suitable for 2 persons only, back seats too tight. Even kids can not fit in. 

3) Cabin can be noisy, not well insulated because it is cabriolet.

206cc is beautiful car I would say but if you looking for speed and handling, other cars might be better.