Without a key or a lock smith the most common way is to drill the lock out. Start with a 1/4 bit and drill in the center of the key hole. Keep moving to larger bits till the lock tumblers break out, then you can install a new lock.
From the outside.
Without a key, you would have to pick it or call a locksmith.
Just open's and close's the valves.
in the glove box there is a button to open the trunk
Take the bulb out.
there is a button to push on the bottom of the drivers door
use a brick to break the window .......dumb a**
Open the hood and look see.
check to see if it has been locked from inside the glove compartment
On a 1998 Ford Crown Victoria : Open the drivers door and on the latch pillar you will see an information sticker that shows the original size of tires on the vehicle from the factory
There is a latch that you have to pull. If it's locked and you don't have the key you'll have to get someone to break or pick the lock
should be fully open by 85 deg C