Hi,
Thanks for your questions.
1) Can you clarify more on what you mean by specific schema? I think an example might be helpful of what you are looking for might be helpful in this case :)
2) Yes, there are additional costs for Storage, it is $23 per Tb of data. Depending on the use case, there could be network egress costs involved with data movements. More details here:
https://azure.microsoft.com/en-us/pricing/details/bandwidth/#pricing. Some other features that are not enabled by default (like thread detection) can also add additional costs.