The motors were installed with rivets at the factory. You need to use a drill and drill out the rivets to remove the motor. The replacement motors come with screws and bolts to replace the rivets.
Depends which screws you are going to use. I usually use the #6 screws that come with blinds. They need no pre-drilling.
Use a carbide bit in a drill. Then install plastic anchors where the screws go.
Yes, everything you need to properly mount it is included except for screwdriver and drill if you need one.
Screws hold the drill body together.
If they are self tapping screws, the drill bit is as thick as the solid barrel of the screw. If you want the screw to go through easily to have a nut on the other side, then the drill bit is slightly larger than thread size.
drill them out and use stainless steel ones next time
Drill into the brick and use plastic anchors and screws.
A titanium or cobalt drill bit.
They are mainly intended for extracting screws or fittings that are broken off in a material. The opposite twist will often pull out broken bolts.
You do not need special bolts. Standard bolts and screws, as long as they are the correct size, can be used.
The use of a Hand drill varies with the bit that is used in the drill. Common uses include drilling pilot holes for nails or screws, putting screws in, boring holes and mixing paint.