First, Why do you really want to house creatures together?
Do not house skinks with salamanders. Some require much higher temps (up to 100F). If you want Skinks, ask the skink forum.
What king of Tree frogs are you getting?
Are you quarantining all of them first?
Do you have UVB lighting for the Green anole?
Pet store's are not a good source of information. Most just want you to buy the product, and will say anything to make you belive it is a good choice.
Is your aquarium ventilated? Is the lid tight fitting?
Have you ever tried cleaning a aquarium of that size? It isn't one that can be put into the sink and washed. And you'll have to carry it where is has to be washed. Try picking it up by yourself before consering it.
You will also have to keep up with maintenance, changing the water often, spot cleaning, misting daily, so on.
You can also not use tap water.
The creatures you mentioned come from different area's in the world.
Fire salamanders are from Europe. Green Anoles and Tiger Salamanders are from the U.S.
Mixing species from different parts of the world is a bad idea.
I do not agree with species mixing. You really shouldn't be mixing any species, even if they come from the same area.
It can also be very stressful on the animals.
If you insist on doing this, please do more research.
Another thing you should think about is how are you going to feed all of them? You may have to buy different size crickets, and more than one type of food. How are you going to know if one animal stops eating? How will you keep them from eating too much and becoming overweight? What about the one that gets no food because its snatched up before it can get too it? Do you really want to buy 100 crickets every week? (thats just a quick approximation)
What happens if you end up with a male and female of one of the species?
Think of why you want to do this to begin with. Is it just something that will look "cool" in your house? Something to show off to your friends?
Most aren't big handeling animals.
When you decide on an animal, research it for at least a month. It seems to me you're jumping from one "Big Idea" to the next. Are you sure you really want these? Are you going to become bored with them after a few weeks?
Ok, I think I'm done ranting. Ask yourself these questions. I hope you change your mind.
Spoony