All Collectibles in order as they appear. The characters used are just examples. Of course, you can use whatever character you like with the according abilities ;-) :
Part A: Assault on Starkiller
In one of the hoops at the end.
Do the race.
Part B: Rey's Escape
Build a device abote the door with the red force field. Go through.
Hover over the gap, where you build the ladder. Open the door with dark force. Go inside.
At the agility climb go way up (story related)
Fight 15 Stormtroopers
Part C: Oscillator Interior
Send someone through the hatch
Build an opener for the big grey box at ground level.
Destroy 4 lamps. The last one is in the locked area to the left. Use the little droid to open it up.
Shoot the gold Lego panel in the locked area.
At the far right, use grapple to get to the balcony. Access the terminal with translation and go through the toxic area.