A plumber with a gas ticket.
A gas hookup will have fittings for a gas line, they should be clearly visible. In an electric hookup there will be an electrical plug, but no gas lines showing.
No. An electric dryer has no burner or combustion controls.
I don't know. I'm trying to find out.
No i would stay with elec only on the dryer as well since many places don't have a gas hookup for a dryer either anymore.
Chances are there is more than 1 outlet connected to the 110volt circuit you are looking to convert. So therefore the easy answer is No. The 240volt dryer circuit must be a dedicated single circuit for the dryer only.
It depends on what kind of dryer you are going to put in though I recommend to put in a 110 dryer so there will be no need for a contractor as the outlet for your washer is usually rated to supply enough amps for both appliances.
The Whirlpool LTG5423D does need a natural gas hookup, which should be found in any modern apartment.
Dryer Circuit Wiring and Hookup Check related link below. Lots of pictures.
It depends on the terms of a lease. If a washer and dryer hookup is not installed in the unit or property, then it is expected that your laundry be done off-premises.
No, a gas dryer uses gas, which cannot be converted into electricity with a simple adapter.
Yes