I have a 03 Lincoln town car and I‘m wanting to put 24‘s on it. It has air bags on the rear and springs on the front.
Go with the Knee Grows Lift Kit. It will suspend the front end until you become smarter.
any modern synthetic fluid will be suitable like lucas oil or similar
Make sure you turn the suspension airbags off before you lift any part of the vehicle. I believe the switch is located in the trunk.