support.apple.com/mac/startup -2006F

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您遇到的错误-2006f表明无法使用该机器从苹果下载macOS，这可能有多种原因。网络通信故障，诸如此类的事情，如果这不起作用，你需要一个USB启动驱动器

Follow these instructions: How to create a bootable installer for macOS - Apple Support

What macOS version is that other system running? Try downloading OS X El Capitan and creating a bootable installer with it.

The error you are encountering -2006f suggests an inability to download macOS from Apple with that machine, which can occur for a number of reasons. Network communication failures, that sort of thing, and if that won't work you need a USB boot drive. It seems everything you did is leading up to the need to contact Apple:

"If you still need help, please contact Apple Support."