You can rest easy because every single Minikit and Character Token along with the Red Brick and Adam West in Peril can only be obtained in Free Play mode so don't panic if you're in Story Mode and can't find anything!
Area 1 - Sewers
Character Token - Croc Henchman
Jump off the ledge at the foreground and into the water below.
Hop on the duck vehicle and drive it into the four smaller ducks. Destroy all four to earn the Character Token.
-Minikit 1 (Free Play)
Keep on the lookout for more colorful LEGO pieces to vacuum up as you explore the rest of the area.
When you have another 25, head back to the Hazard Suit machine and deposit them for a Minikit
-Minikit 2 (Free Play)
Keep your eye open for 5 golden toilets.
Destroy them all with a laser to earn a Minikit.
-Minikit 3 (Free Play)
Destroy the gold portion of the pipe above the flame jets.
Use a character with magnet power to turn the valve next to it then fly up and claim you Minikit.
-Minikit 4 (Free Play)
Fly up to the area above the hatch platforms and use a character with mind control to make the guy behind the waterfall pull the switch.
Head to the right to pick up your Minikit.
Area 2 - Killer Croc
Character Token - Bane (Free Play)
Use a character with ice power to freeze the puddle near the area's entrance into a Killer Croc sculpture.
Melt it with a laser to get at the Character Token inside.
Hub - Batcave
Area 1 - Batcave
Area 2 - Batman Boss Battle
Hub - Watchtower