Questions about Motorola PMR T42

Is there 2.5 mm jack connection for headset in this device?

Hello! Are batteries included in the delivery? Thanks for the help!

We are going on holiday with 2 cars. Would that work to communicate like this?

Does the radio have a VOX function? I would also like to use the radio as a baby monitor, for which it would also have to be able to send tones without having to press a button.