@tufanaydin,
> -Ancillae, in culina numquam laboratis.
> (this is vocative but i'm not exacly sure. can you help me for this?)
Yes, ancillae is the vocative plural of ancilla.
> -Viri ad silvam ambulant et cum incolis pugnant.
> +Man is walking towards the forest and is fighting with the inhabitants.
Note that viri ambulant and pugnant are
plural.
> -Poeta reginam sapientia non semper delectat
> +Poets does not always delight queen's wisdom.
Poeta is singular.
Reginam is accusative, not genitive.
Sapientia is ablative.
> -Ceacilius epistulam et pecuniam ad filium mittit
> +Ceacilius sends a letter and money to (his) son.
Looks good to me.
> -Cur servi pecuniam in casa celant?
> +Why does hide their money in the house?
Don't forget servi. That is the nominative plural of servus.