I hate to throw a monkey wrench in the above conversation but very few teens in Japan have drivers licenses because the things are so freaking expensive

Oh and the minimum driving age is 18
Sorry as Otaku I thought I should point that out

Now we could steal a teacher's car but it would be very small even at Fujimi Academy due to the high road taxes for large cars an trucks

The safest bet would be a delivery truck with a box back
In the HOTD anime an Manga they had to luck out an find a car and found a military Hummer if I remember