Yes, you can replace just the "boots" on the end of a rack-and-pinion steering provided that the mechanism is not damaged. Unfortunately, the boot is just a dust cover and if the inner mechanism has started leaking there really isn't much that can be done without completely disassembling the mechanism. The fluid in a rack assembly is under pressure from the Power Steering pump and once it starts leaking the rack is pretty much "done".
How to separate steering yoke from rackpinion with out removing rackpinion from truck 1992 Dodge Dakota 2-wd sport
You have to get a punch and a hammer and drive out the roll pin from the clevis on the shaft of the imput steering gear and then tap it off with a hammer
Assuming you are putting it in the power steering, why not?
Assuming you have power steering, you may have a loose belt or the power steering system has a leak and the power steering fluid reservoir is low or empty.
The complete steering box comes out the bottom, without steering wheel attached.
Assuming you mean the steering column, it is what transmits the turning of the wheel in your hands to the steering mechanism which moves the wheels that are touching the ground.
No the power steering is not necessary to run. Steering will be difficult and I wouldn't personally recommend operating the vehicle with out it.
This allows you to have some freedom in your steering. You can make some changes and even sharp turns if necessary.
You can replace a steering wheel cover by first removing the old steering wheel. Once complete, wash and dry clean the steering wheel and then apply your new steering wheel cover.
in place of the existing one,assuming it is equipped with one
To remove the steering wheel knuckle, first, ensure the vehicle is securely lifted and supported. Disconnect the battery, then remove any necessary components, such as the steering column cover and pinch bolt, to access the knuckle. Carefully detach any associated tie rods or linkage, and use appropriate tools to unbolt the knuckle from the steering rack or column. Once unfastened, gently pull the knuckle away from its housing to complete the removal.
I'm assuming that your steering wheel has locked. Try jerking the steering wheel back and forth while turning the key to start it.