Between $50 and 2 grand based on where the leak is located.
depends on where the oil leak is at
It depends on where the leak is and what is causing the leak.
Depends entirely where the leak is coming from.
We need to know the source of the oil leak to give you any kind of answer.
You can't imagine what a broad question you asked. What is the leak and what do you have?
An oil leak problem probably is the sign of a problem in your oil pressure or it could simply be a slow leak. The problem can cost anywhere from $100.00 to $400.00 for an oil pressure problem.
The cost would depend on where the engine is leaking from. A leak from the main seals is far more expensive than a leak from a gasket.
At a shop with parts and labor approx. $750, due mostly to labor, labor hours are usually flat rate and this job takes some time around 4 hours on average, personally do it and pay (if you have tools) approx. $100 more less with cost of replacing the oil as well.
We are going to need to know where the source of the leak is to help you with that question.
Replace the head gaskets.
You do not recharge coolant, you replace it. If you are referring to refrigerant in the A/C unit, then first you need to have the leak repaired. It would not need recharging unless it is leaking. It is illegal to add refrigerant to a system that is leaking without repairing the leak. This is a job for a professional with the proper tools and knowledge. This is not a DIY repair. The cost depends on where the leak is.
If it the gasket on the oil pan leaking, it would cost approximately $450 to have the oil pan removed and the gasket replaced.