Athe green ones up top, nowadays MOSI is COPI
ASSD1306 comes 128x64 / 0.96"
AAAjust an example, they are made by the millions in one secret factory someplace 
Athey are on standard 0.1" (2.54mm) pins
Afemale duponts work
Aor just wire directly to it if you get one without header pins
Ai would wire the 4 leads to wires to a standard JST connector, put he mating connector on your PCB
Athen the display plugs in, or just solder wires
Ayes, Vcc = 5v (think it runs on 3.3v too)
Awhatever you can find, as long as its 4 pin
Tbtw, it also depends on what you're trying to build as there are a bunch of pretty cool Waveshare & LilyGo products out there that combine the display & microcontoller in one compact board (some even have additional modules built in, typically an IMU & lithium battery chrging circuit)
Athe "GC" displays are fun for Halloween
AOP mentioned they were going for a simple temperature display though
Tbeen playing around with these 1.28" round displays (RP2040-powered, there's also an ESP32 version) & yes, you can add a temp/humidity sensor & use it as a mini weather station...
(there's even a rectangular version with touch screen folks are turning into DiY Home Assistant thermostats through ESP Home)
(there's even a rectangular version with touch screen folks are turning into DiY Home Assistant thermostats through ESP Home)
Anice
Ayou'll need to fix all the DRC errors before you ship off the design
Ai assume you're using KiCAD or EasyEDA?
Athe errors are because of things like not specifying if pin X is not connected (or did they forget about this pin 
)
)ADesign Rules Check
Athere's a way to mark them no connection
T... the software's warning that you may have forgotten to connect those pins... which is why you have to indicate them as
NC/(no connection) as mentioned to get rid of the warnings...Aso you work your way until there are no errors, iirc there is a way to mark power bus connections
Abut to the schematic editor they're just wires floating in the air