How much iCloud storage do I need to transfer iPad Air files and to new iPad Pro 12.9
How much iCloud storage do I need to setup a iPad Pro 12.9 from an iPad air
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Not all methods of transferring data between old and new iPads require the use of iCloud storage.
These support pages should get you started with setup of your new iPad - and the methods of directly transferring your data from old to new iPad:
Set up your iPhone, iPad or iPod touch – Apple Support
Transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch - Apple Support
Use Quick Start to transfer data to a new iPhone, iPad or iPod touch – Apple Support