Hello! Welcome to CF!
You came to the right place for info

So, you need to know EVERYTHING?
Lol
Chams need a screen cage, or a terrarium with lots of airflow. Screen would be best for your area.
The recommended adult cage size is 2x2x4.
I recomend starting with this size, that way you dont wind up buying multiple cages.
You will need the proper lighting.
A basking dome can be bought at walmart or a hardware store.(like the kind with a clamp for working on cars.)
You will need to use a regular household bulb for basking.
75watts is a good starting point, but you may need to play around with different watts to get temps right.
You will also need a 5.0 UVB light.
A linear flourescent bulb is best.
You can use a "hood" style fixture, like the kind used on fishtanks.
It is cheaper to buy a shop light from a hardware store though.
Most of them will hold two bulbs, you can use one for UVB, and one for a plant light.
Plants to put in your cage are highly recommended. They give off oxygen, and REALLY help keep humidity up.
I personally would rather buy a $5-10 live plant, than a $10+ fake one.
That being said, fake can be used as well.
A dripper, and a sprayer to provide water.
A dripper can be made easily, or bought at a pet store.
I recomend getting a pesticide type hand pumped sprayer for misting.
An outomatic misting system will make your life alot easier, chams need spraying at least 3 times a day, so even if your not at work or school, you are going to get tired of spraying them eventually

Chams like to be up high, so an appropriate place to put them is important. The amount of water being put through the cage will be significant. So you will need to place it above a tub/bucket for it to drain into.
You will need feeder insects, and need to gutload them well with fruits and vegetables.
You will also need supplements to balance the chameleons vitamins and minerals.
Plain Calcium.
Calcium with D3
Multivitamin
or
Repashy makes an all-in-one supplement called Repashy calcium plus.
You will need a low traffic area to put the cham in as well.
Thats all I can think of atm as far as bare essintials.
If you have any specific questions, feel free to ask
