I'm an ADAC member and can log into their site for a quote without any further registration. PM me your car details and I'll see what it comes up with...
As for other costs...
When you register the car there are one-off costs for registration (Zülassung) and new numberplates costing around 40 Euros total.
Then there is an annual Kraftfahrtzeugsteur which depends on the type of motor, emmissions certification, age and engine size and can be calculated here
(which is really the rates for Niedersachsen, but is similar in Bavaria)
You need a TÜV every 2 years (like a UK MOT) costing around 75 Euros (plus any repairs to get it through) and an exhaust emmisions check, also every 2 years, usually done at the same time as the TÜV costing around 30 Euros.
Not taking into account fuel, oil, tyres, servicing, repairs