Shampoo the engine to clean it. Check for leaks in a day or so depending on how bad the leak is. Replace the component causing the leak. If you still can't find the leak you can put dye in the engine oil and look for the leak with a black light.
That isn't much consumption.. If it buggs you take it to a garage and have them give you an estimate.
You don't. If it needs refrigrant, it has a leak. Take this to a professional. You have neither the tools nor the expertise to repair.
You can find a small vacuum leak in your 2002 Toyota Camry with a diagnostic tester. The diagnostic tester can pinpoint virtually any vacuum leak.
There is not enough information to answer this question
The Camry could have a vacuum leak. If there is a vacuum leak, then there can be a whistling sound until the vacuum system is full of air.
Oil can either be burned, or it can leak
Check to see it the valve cover bolts are torqued to specs. If this does not stop the leak, the gasket needs replacing.
repair the leak
$4 to $5 for Toyota o-ring. Don't use after-market. 1 hour labor. Go to dealership because they will warranty it for 12 months. It may leak again after 6 - 10 months. If u buy the Toyota part and give to your mechanic, u will get no warranty.
Yes it is, you have to get it looked at ASAP.
You need to replace the oil seal.
Your dealer can tell you if there is a complimentary repair for this. Sounds like it has a leak and is low of refrigerant.