Messages

I have bought the canon 500d, 650d and now 60D all second hand without any problems.
I wouldn't get the 750D maybe you should look at the 70D.

Just use the canon EOS utility...... free and works

1) Best way to delete the pictures/videos off the SD card is to format in camera without deleting ML there is an option in the format tab.

2) Go to the Prefs tab, Powersave in LiveView, and then you can select to Dim the display turn of when you press the INFO button on the camera/0

Magic lantern does not affect the canon menus and does not have the ability to change playback on videos only pictures.

What camera do you have, and yes magic lantern has an inbuilt intervalometer that allows you to take as many pictures as you want to, set the duration between shots and stop after a set amount of images taken.

Go into magic lantern menu, Shoot tab, Shoot preferences, Pics at once = (change number to what ever you want)

I think you should do some research about magic lantern and 6D raw capability first.
--------------------------------------------------------------------------------------------------
But i'am going to condense the answer to your problem a little. 
When you record raw to goes from the sensor > camera buffer > sd, the SD card interface on the 6D is slow SO the buffer gets filled up fast and cuts the recording time; you can spend $300 on a ultra fast SD card with 10,000 MB/S speeds but that interface is still gonna cause a bottle neck.

So that's why you can only record at that resolution for such a sort amount of time, to mitigate the problem you can select to record in a different aspect ratio like 2.35:1 instead of the standard 16:9 and drop to 1280x582 to get continuous recording + use 24fps

I don't think so