1.) No, no you do not. But, there is a menu option whereby you can enter a focal length for several manual lenses. This length (when a manual lens is on the body) is entered into the EXIF data. Note: You need to switch between the manual fl settings for the various manual lenses, the camera does not know which manual lens is attached.
2.) That would be a neat trick to have, but alas, no. Aperture Priority needs the camera to control the shutter speed, etc., while knowing the f-stop, but without any electrical contacts on the lens, …
Focus peaking works well enough as do the other manual focus assists the camera provides. This is because the assists use the image that hits the sensor, things such as good lighting, etc. are determining factors.
This may help: https://blog.roycruz.com/using-manual-lenses-with-the-fuji-x-system/
p.s. Welcome to the forum.
edit: Dang typos!
Edit for 2.): As @thelostkiwi mentions, if you are fortunate enough to have a lens with an aperture ring, you can get Aperture Priority to work. Depending on the body you may need to set the Mode Selector switch to 'Auto' (this the switch under the shutter speed switch) and set the shutter speed to 'A'.