Some day I want to get a pet iguana
That would be cool! The word Iguana is actually from the original name Taino, meaning iwana
I had no idea. My neighbors have one and is like a teal color
That is really cool! Iguana are actually lizards that live in areas of Mexico and Central America
yes!  they like the heat.  Which is why they need heat lamps when you own one.  
That is cool! Is it expensive? I know they range in  lengths, including their tail
Im not sure.  Maybe around $100.  Maybe more if they are young.  
Thats cool! I do know that behind their necks are small scales known as tubercular scales