What do i need to get this motor running off a car-battery?
You need just motor, switch, wire and fuse.

The motor has a stall current of 0.5A.  That's the most it'll ever expect to draw.  So you need a fuse that'll blow at more than that (1A would be fine). You also need wire that can take 0.5A minimum.

You also need to consider how far from the battery the motor will be.

Under normal operation it'll be somewhere between 95mA and 500mA (0.5A) current draw depending on the load it has to move.  So we'll take the worst case of 500mA.

24AWG is the absolute thinnest wire you could get away with for 500mA.  Any thinner than that and it'll fuse.  24AWG has a resistance of 25.67mΩ per foot.  Using the formula:
$$
V=R \times I
$$
we can work out that, per foot at 500mA, you would drop:
$$
V = 0.02567 \times 0.5 = 12.8mV
$$
So after 10 feet of wire your 12V would be (12 - (0.0128 * 20) * 2) 11.744V.  Note, it's times 20 not times 10 as you have to remember, it's "there and back again", so 10 feet distance is 10 feet of wire there, and 10 feet back again, so 20 feet of wire.

But, choosing thicker wire, say 18AWG, which is about twice as thick as 24AWG, the resistance drops right down to just 6.385mΩ per foot.  So for 10 feet distance (20 feet of wire) you'd be losing just 64mV, so your 12V would still be 11.94V.