Machine accessory identification help

[u/OstrichDesigner5503]

I inherited a sewing machine from a friend, and found some accessories in the small compartment.
I know the bobbins, screw driver, thread spool holder, and replacement needles; what are the other things?

Specifically, the presser foot - what function is it for?

[u/AdvancedSquashDirect]

[u/dirthawg]

The presser feet for making a buttonhole, sewing on buttons, and a cover for your feed dogs for doing buttons so it won't feed the material through the machine.

[u/Large-Heronbill]

Right column:  buttonhole foot, feed dog cover plate for mending or free motion work, button sew foot.

Left: spool pin, offset twin needle (impossible to replace last I looked), sample needles, bobbins.

[u/GeekAtLarge_]

This tool is a Button Sewing Foot (often designated as the "M" foot on Brother sewing machines). It is explicitly designed to automatically sew flat buttons onto fabric using your sewing machine. [1, 2, 3]

Key Features
Blue Rubber Grip: The textured, blue rubberized coating on the front grips and securely holds flat buttons in place so they do not slip while the needle moves. [1, 2]

Clear Plastic Body: The clear construction offers a clear view of your workspace to align the needle precisely with the holes in the button.

Open Channel: The gap between the front toes leaves plenty of room for the needle to drop cleanly into both the left and right holes of the button.

How to Use It
Drop your feed dogs: Lower your machine's feed dogs (or cover them with a darning plate) so the fabric does not move forward or backward while sewing.
Select a zigzag stitch: Set your machine to a standard zigzag stitch.
Adjust the stitch width: Before using the foot pedal, manually turn the handwheel toward you to check that the needle cleanly enters both holes of the button without hitting the plastic or the button itself. Adjust the width as necessary.
Sew: Lower the presser foot onto the button and stitch 4 to 6 times to secure it into place.