goebish

No.

Way less than 100m ... even indoor, telemetry stops working 1 or 2 rooms away. But that's not a big deal, you still have control ...

1 . just contact hpnuts (Pascal) on rcgroups, I'll give you his address so you send one to him 5 . there are only 16 fixed IDs for this protocol...

According to Google image, the Sky Thunder line of product is using 2.4 GHz remote controllers (at least the quadcopters, but I've never seen an IR multicopter ...). For infrared...

Yes, that's the only way ;)

that's not possible, Walkera protocols are using a CYRF6936 transceiver, not the NRF24L01

4-in-1 Multi Protocol Module: https://github.com/pascallanger/DIY-Multiprotocol-TX-Module

That's probably possible with the OrangeTX module, procedure is here: https://github.com/pascallanger/DIY-Multiprotocol-TX-Module/blob/master/docs/Compiling_OrangeTx.md and here: https://openrcforums.com/forum/viewtopic.php?f=40&t=8753 I don't know how it works exactly, read the procedure on github first, then come here...

Sorry, this git isn't about the Multi Protocol Module, you can ask your question here: https://www.rcgroups.com/forums/showthread.php?2165676-DIY-Multiprotocol-TX-Module

Also, not every version of the CX10 is compatible with those modules, maybe yours isn't supported (yet).