Here a list of id you can use to spawn vehicles. You can spawn them by doing @vehicle <player>/<ID> ex. @vehicle kyle/52

1 - Black Offroader (4 seats)
2 - Blue Offroader (4 seats)
3 - Green Offroader (4 seats)
4 - Orange Offroader (4 seats)
5 - Purple Offroader (4 seats)
6 - Red Offroader (4 seats)
7 - White Offroader (4 seats)
8 - Yellow Offroader (4 seats)
9 - Black Hatchback (4 seats)
10 - Blue Hatchback (4 seats)
11 - Green Hatchback (4 seats)
12 - Orange Hatchback (4 seats)
13 - Purple Hatchback (4 seats)
14 - Red Hatchback (4 seats)
15 - White Hatchback (4 seats)
16 - Yellow Hatchback (4 seats)
17 - Black Truck (5 seats)
18 - Blue Truck (5 seats)
19 - Green Truck (5 seats)
20 - Orange Truck (5 seats)
21 - Purple Truck (5 seats)
22 - Red Truck (5 seats)
23 - White Truck (5 seats)
24 - Yellow Truck (5 seats)
25 - Black Sedan (4 seats)
26 - Blue Sedan (4 seats)
27 - Green Sedan (4 seats)
28 - Orange Sedan (4 seats)
29 - Purple Sedan (4 seats)
30 - Red Sedan (4 seats)
31 - White Sedan (4 seats)
32 - Yellow Sedan (4 seats)
33 - Police Car (4 seats)
34 - Fire Truck (2 seats)
35 - Black Van (5 seats)
36 - Blue Van (5 seats)
37 - Green Van (5 seats)
38 - Orange Van (5 seats)
39 - Purple Van (5 seats)
40 - Red Van (5 seats)
41 - White Van (5 seats)
42 - Yellow Van (5 seats)
43 - Black Roadster (2 seats)
44 - Blue Roadster (2 seats)
45 - Green Roadster (2 seats)
46 - Orange Roadster (2 seats)
47 - Purple Roadster (2 seats)
48 - Red Roadster (2 seats)
49 - White Roadster (2 seats)
50 - Yellow Roadster (2 seats)
51 - Ural (8 seats)
52 - Humvee (4 seats)
53 - APC (5 seats)