>>Heating-
>> Would heat from the bottm of the cage be better or from the top? So what I am asking is, is it better to have the bottom of the cage colder or the top of the cage colder. I am used to snake and horizontal cages not vertical one.
Unless your home is exceptionally hot or cold, they do pretty darn well @ room temp, so usually a heater is not strictly necessary.
>>
>>Food-
>> Comments on the T Rex diet for Crested geckos.
>>
T-Rex CGD is good stuff, mine loves it (though she started out almost completely ignoring it in favor of crickets, but once she got most of her growing out of the way, her preference seemed to shift.)
>>Coloration-
>> Do males show more color that females or is it pretty much the same.
>>
I don't know the authoritative answer to that, but in my somewhat limited personal experience, they are about the same as far as coloration goes.
>>Size-
>> Do males get larger than female or the other way around?
>>
Sizes are pretty similar between the sexes - there might be some variation, but I don't think it's a huge difference.
>>Cage Decor-
>> What types of wood are safe and how would u attach fake vines to the glass so the geckos dont knock it over and get hurt?
>>
I remember cedar being toxic to most lizards.
As far as the vines go, I have some fake vines in a 10 gallon with my crested, and they're actually stiff enough to hold her weight just fine when she climbs though them w/o any suction cups, etc. We tried with the suction cups at first, but she kept knocking the vines off of them, and the hooks on them worried me a bit, given that cresteds leap a lot - I didn't want to find her impaled on one (not that they're sharp, but cresteds can put a fair amount of power into a leap).
My current setup for her is paper towel substrate, a plastic hide, a water dish, a food dish, a fake tree, and a bunch of fake vines. There's not a lot of open space in there, so she's got plenty of places to hide it holds humidity reasonably well, and with paper towels as substrate, it's pretty easy to clean, which is important, cause holy crap do they poop everywhere, and a lot!
-----
0.1 Albino Leopard Gecko - Tigger
0.1 Crested Gecko - Pooh-Bear