All the informatoin you need including what label standards to look for will be in your owners manual.
If you don't have a manual for some reason the viscosity (thickness) is probably shown on the engine oil cap. I believe it'll be 5W-30. Any major brand oil (as long as it's the proper viscosity) will work fine. Whether you choose conventional oil or synthetic depends a lot on the kind of use you're putting the car to and the depth of your pocketbook.
Cheers
The 2001 Toyota Camry has double overhead cam (DOHC).
DOT 3
Dexron lll or lV or equivalent.
For a 2001 Toyota Camry, the recommended transmission fluid is Toyota Type T-IV automatic transmission fluid. It's important to use this specific type to ensure optimal performance and longevity of the transmission. Always check the owner's manual for any specific requirements or updates regarding fluid specifications.
You didn't say what engine you have? Check the link and it will tell you.
The 2009 Toyota Camry has double overhead cam (DOHC).
The 2008 Toyota Camry has double overhead cam (DOHC).
The 2014 Toyota Camry has double overhead cam (DOHC).
The 2005 Toyota Camry has double overhead cam (DOHC).
The 2004 Toyota Camry has double overhead cam (DOHC).
The 2006 Toyota Camry has double overhead cam (DOHC).
The 2002 Toyota Camry has double overhead cam (DOHC).