You said..."i mean the veiled also have the puffle chin"...sometimes they do.
You askde..."erm...is a baby panther suitable for beginner? i mean...will it be any problem if i follow the right way? i never want to make my first cham die young...hehe"...I would advise you to get one that is at least several months old. There is a natural mortality....a certain percentage of them will die when they are really young, but once they are past several months of age, the rate of death drops considerably. I would advise that you get a male over a female too....they live longer and you don't have to worry about the egglaying process. Female panthers can lay eggs even when they aren't mated...so they need a place to be provided in the cage for them to dig in to show you that they are ready to lay eggs.
You said..."the place that i live in is around 75F - 90F...and it's high in humidity...do u think is better if i place my cham outdoor? for better sunlight"...sunlight is definitely better for them than artificial UVB/light. You just need to make sure that they can get out of the sun...so provide some shade for them. You will likely have to mist/water one more often if its outside on the hot days too.
Do you know about gutloading the insects? Supplements?
You asked what you need before you bring the chameleon home...
You need a mesh/screen cage, a non-toxic plant that you have washed well (both sides of the leaves), some branches of the appropriate size for the chameleon's feet to grip, and a sprayer/misting bottle. You also need phosphorous-free calcium powder (insects have a poor ratio of calcium to phos. so this is intended to balance it), vitamin powder that the vitamin A source is beta carotene (vitamin A from preformed sources can build up in the system, but beta carotene can't).
If he's kept inside, then you will need a full-spectrum/UVB light and an incandescent light in a hood for a basking light. If he is never outdoors, then you will need a calcium/D3 powder too. Vitamin D3 from supplements can build up in the system but from sunlight it can't. (Any light/sunlight cannot pass through glass or plastic.)
Here are some sites with good information that you might like to read...
http://adcham.com/html/taxonomy/species/fpardalis.html
http://adcham.com/
http://www.chameleonnews.com/