14" Wheels on 94 V6 Camry???

The answer is: it may or it may not. Your car has stock 15" rims. Sometimes, wheel sizes are made to clear the brakes. The diameter and width are determined to ensure proper clearance. Try to put one of the wheels on and see if it fits. I doubt it but it is worth a shot.

There should be no problem with that

It can, if you take care to get the rolling radius and therefore the circumference of the wheel and tyre about the same. You need to do this or your effective gearing and speedo calibration will be different.

Assuming your car is fitted with 205/65-R15, which is a common size here in Oz, on 14" rims of the same width, 6", you would need 195/75, 205/70, or

See

Also take care that the rims you get will clear the brake calipers and other suspension components through the whole range of wheel travel, since the rim offset may be different. You may also find that your handling and ride may change a little since the sidewall height will be greater.

Geoff