Yes. But remember not to switch them on until the plane is airborne.
Of course you can, they let me!
no
Actually the answer is not very easy. 1. Which passenger class are you travelling?, 2. Which ticket type do you hold?, and which airline will you fly?; Generally an allowance for 20 to 30 Kg of...
You should be able to, as an ink catridge is less then 100ml, but it will have to go in a plastic bag.