Christenings AFAIK are free as such (this is referring to the religious procedure, not photography), so you wouldn't have to pay for anything which is in the church "anyway" methinks.
As for photography, that of course would have to be covered by you. Example 1 - CHF 220? Example 2 - CHF 500?
It'd probably be loads cheaper to have a friend (whose style you love) do this for 100 bucks and a dinner.