We call the seats the passenger seats and the driver's seat.
The right side of the car is usually called the passenger side of the car.
I "get comfortable for my drive" — for my commute — notice we use drive there as a noun; it can be a verb and a noun.
"I put my coffee mug into the cup holder."
A mug, "mug," is just a big cup.
We talk about coffee mugs, they're big cups that you put your coffee into.
In many cars, there is a special place for a cup or a bottle, and that's called a cup holder, "holder."
It holds the cup so you can have your coffee in your car.
I "put the keys in the ignition."
The keys are, of course, what starts your car.
It's the piece of metal that you open your car door with — you unlock it.
Well, you also start the car with your keys, and you put them into something called the ignition.
And, the ignition, "ignition," is the part of the car that starts the engine.