Bad for my engine?

I am guessing that you want to do this to not wake anyone up when you start the Jeep... Don't forget to use your emergency brake to slow it down because you have no power brakes until you have started the motor..and NO it won't hurt anything.

No, there is nothing wrong with it,,, it would mess up ur transmission if you have ur car in D all the time when you let your car roll donw(only if its automatic, even though most automatic cars wont roll down if u put them on D)

No, when your vehicle is in neutral, your wheels are spinning free of any restriction from any part of the drivetrain. Its not going to hurt your engine at all.

not at all.. even leaving it in a gear wouldnt hurt your engine as much as it would the transmission. As long as its in neutral its fine

That is the best thing you can do for it...cudos for you for being a responsible car owner.

Coach

Is your transmission an automatic or manual?

No, but why would you want to do it?

VERY.

no.