Which costs do I need to be aware of for the various shipping options?
That depends on the shipping option that you are using. A summary of all of the shipping options is available here.
Related questions
What are the maximum dimensions of a package?
What is the maximum allowed weight of a parcel with an international destination?
Is my parcel with a destination in the Netherlands automatically insured?
Can I send a shipment with MyParcel with a cash on delivery option?
Can shipments be sent with express delivery?