You need to replace the oil seal.
To answer your question; I would say your Freon is low and you need a recharge but it also tells me you have a leak somewhere.
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
Yes it is, you have to get it looked at ASAP.
The 1997 Pontiac Sun fire axle seal can leak because of age. A bad wheel bearing is the most common cause for an axle seal to leak.
You do not have many choices either replace it or if the leak is not sufficient buy one of those leak fix bottles.
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.
Low coolant level, internal or external coolant leak or faulty thermostat.
Clutch fork or cable broken. it might have a hydrolic leak. Check the master in the clutch