To make accurate 90 degree and angle cuts .
The mitre saws forward and the back saws backford.
For speed, you would use a circular, or 'skilsaw' . You could also use a tablesaw, a mitre saw, a chopsaw, or even a reciprocating saw .
Mitre or jigsaw
You can, but an oil based cleaner would be better. I use WD40.
mitre saw,mitre gauge,measuring tape,mortise gauge,mallet
At least big enough that you can secure it safely while cutting.
Yes
It is a mitre saw that only angles one way.
Cutting angles on wood.
Cutting angles, usually for trim and molding.
A mitre saw can cut wood at any angle you wish in both directions.
The motorised Mitre saw can cut materials at very exact angles.