LEGO Batman

It's worth noting that you must actually buy all of the vehicles through the computer in the Batcave or Arkham. While each of the vehicle levels gives you each of the story mode playable vehicles for free, there are others made available to buy by completing other levels.

You will need to spend a total of 752,000 studs to buy the remaining vehicles.

Vehicle unlocks by level:
Hero:

1-3
Batmobile
Batcycle
Police Car (10,000)
Police Bike (11,000)
Police Van (13,000)
The Joker's Van (60,000)

2-2
Batboat
Robin's Watercraft
Robin's Submarine (30,000)
Penguin Goon Submarine (15,000)
Harbor Helicopter (16,000)

3-1
Mad Hatter's Steamboat (23,000)
Mad Hatter's Glider (18,000)

3-3
Batwing
Batcopter
Bruce Wayne's Private Jet (15,000)

3-5
Bat-Tank (200,000) (Assuming you have completed all 3 hero stories)

Villian:
1-2
Mr. Freeze's Kart (25,000)
Mr. Freeze's Iceberg (23,000)

1-5
Two-Face's Armored Truck (24,000)
Riddler's Jet (17,000)

2-2
Catwoman's Motorcycle (23,000)

2-3
Penguin's Submarine
Killer Croc's Swamp Rider
Police Watercraft (12,000)
Police Boat (13,000)

3-1
Harley Quinn's Hammer Truck (80,000)

3-2
The Joker's Helicopter
The Scarecrow's Biplane
Police Helicopter (14,000)
Goon Helicopter (11,000)

3-4
Garbage Truck (99,000)

the codes will unlock the vechicles however you will still need to complete both the hero an vill campaigns so theres really no point in putting in the codes for these or the characters unless you enjoy spending time in the menus (no1 does) so save yourself time an only put in the extras an suit codes so you dont waste time an you can get an easy 1000g in a few days (the other codes make it to were you never need to worry about your stud count 4 billion in a few games

You can use these codes to unlock all of the vehicles:

Bat-Tank KNTT4B
Bruce Wayne's private jet LEA664
Catwoman's motorcycle HPL826
Garbage truck DUS483
Goon helicopter GCH328
Harbor helicopter CHP735
Harley Quinn's Hammer Truck RDT637
The Joker's van JUK657
Mad Hatter's Glider HS000W
Mad Hatter's Steamboat M4DM4N
Mr. Freeze's Iceberg ICYICE
Mr. Freeze's Kart BCT229
Penguin Goon Submarine BTN248
Police bike LJP234
Police boat PLC999
Police car KJL832
Police helicopter CWR732
Police van MAC788
Police watercraft VJD328
Riddler's jet HAHAHA
Robin's submarine TTF453
Two-Face's armored truck EFE933