Im really too lazy for summary, ask in the comments and i´ll add information to the summary.

Partslist. Unfortunately the Rotary Encoders I bought back than are not available anymore.

4x Rotary https://www.amazon.de/gp/product/B07DM2GN2Z/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

1x Microswitch

4x 3 way toggle switch
https://www.amazon.de/gp/product/B075S9FH7F/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

1x TM1637 7 Segment Display
https://www.amazon.de/gp/product/B078S7Q6X7/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

9x Pushbuttons
https://www.amazon.de/gp/product/B081TV622R/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1

2x Killswitch
https://www.amazon.de/gp/product/B01FHLPOK2/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1

1x Startbutton
https://www.amazon.de/gp/product/B07BKYLJKZ/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1

1x Pro Micro
https://www.amazon.de/gp/product/B07FQBQ4Z6/ref=ppx_yo_dt_b_asin_title_o07_s01?ie=UTF8&psc=1

1x Wemos D1 mini
https://www.amazon.de/gp/product/B07FQBQ4Z6/ref=ppx_yo_dt_b_asin_title_o07_s01?ie=UTF8&psc=1

4x M3x4mmx5mm threaded insert
https://www.amazon.de/gp/product/B082R28J4T/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

Carbon Foil
https://www.amazon.de/gp/product/B07VGR8S7F/ref=ppx_yo_dt_b_asin_title_o07_s01?ie=UTF8&psc=1

And a lot of wires

I suggest you to use the AMStudio Buttonboxtutorial if you dont want to write your own code, since it has a similar button layout https://www.youtube.com/watch?v=Z7Sc4MJ8RPM