The first Red brick is given to you free when you start the game but subsequent ones can be purchased at any time during Gameplay by either visiting D'Qar in the shop or by checking out the Character Wheel (the Red brick is in the lower left corner). Buying Red bricks will enable you to unlock new cheats for the game such as Stud Magnet, Build Speed increases, and Multipliers. The video below will show you the location of all the Red Bricks in the game.
00:00 Shows where to find and buy all the red bricks in the game. Buying all the Red bricks will unlock the Red Leader Trophy / Achievement.
01:24 Red Brick 1
The Battle of Endor - Fast Build (100.000 studs) or Stud Magnet (200.000 studs).
02:08 Red Brick 2
Assault on Jakku - Fast Build (100.000 studs) or Stud Magnet (200.000 studs).
03:02Red Brick 3
Escape From the Finalizer - Fast Interact (200.000 studs).
03:21 Red Brick 4
Niima Outpost - Studs X8 (4.000.000 studs).
04:16 Red Brick 5
The Eravana - Studs X2 (2.000.000 studs).
05:05 Red Brick 6
Rathtar Hunting - Fast Force (200.000 studs).
05:37 Red Brick 7
Maz's Castle - Studs X6 (3.000.000).
06:13 Red Brick 8
Battle of Takodana - Destroy on Contact (200.000 studs).
06:44 Red Brick 9
The Resistance - Super Slap (500.000 studs).
07:18 Red Brick 10
Starkiller Sabotage - Studs X4 (2.000.000 studs).
07:38 Red Brick 11
Destroy Starkiller Base - Regenerating Hearts (500.000 studs).
09:33 Red Brick 12
Epilogue Luke’s Island - The Funk Awakens (1.000.000 studs).
10:11 Red Brick 13
Lor San Tekke’s Return - Collect Guide Studs (200.000 studs).
11:41 Red Brick 14
The Crimson Corsair - Imperial Inaccuracy (1.000.000 studs).
12:10 Red Brick 15
The Finale - Studs X10 (5.000.000 studs).
12:47 Red Brick 16
Poe to the Rescue - Infinite Torpedoes (500.000 studs).
14:06 Red Brick 17
Trouble Over Taul - Regenerating Combat Bar (1.000.000 studs).
14:47 Red Brick 18
Ottegan Assault - Super Disco Blasters (200.000 studs).