Hi there, thanks for posting on the Army List section. Heres the changes i'd make. Feel free to ignore if you disagree or are offended. However, I will say that i'm not new to Warhammer or lizzies ;p Your list is below, with suggestions.
so im new to fantasy and this is the list ive come up with, suggestions are welcome
Saurus oldblood 435
-blade of revered tzunki
-enchanted shield
-carnosaur
lvl 2 skink priest 440
-x2 dispel scrolls (Not necessarily needed. You have some dispel dice. 50 points worth of scrolls is almost as much as another priest with cloak of feathers (who is 90). And he ca march block people.)
-Engine of the Gods
CORE
x20 saurus warriors 270 (MAKE units of 18, ranked 6x3. You want maximum frontage cos Saurus are ownage)
-spears
-full command
x20 saurus warriors 270 (MAKE units of 18, ranked 6x3. You want maximum frontage cos Saurus are ownage)
-spears
-full command
x20 skink skirmishers 140 (Make into 2 units of 10)
x15 skink skirmishers 105 (Get 5 more. Make into 2 units of 10)
SPECIAL
Stegadon 235 (Drop this. Why explained below)
x3 terradon riders
Ok. Your army would be pretty good with the changes above.
Why drop the stegadon you ask? Well, it sucks but theres this thing called sportsmanship. Your new to the game so its not yuor fault, but having three big terror-causing tough fatties can be seen as cheesy. Thats cos it is.
However, there is an upside. You will have 235 points to spend on real troops. If you spend the points correctly (cleverly), the new units you get will, i assure you, pay off more than one big fatty Stegadon.
You [Could] or [Should] get-
-[Could] skink priest (level 1 or 2) with cloak of feathers (dropping 1 or both dispel scrolls on your first priest)
-[Should] A unit of 5 Chameleon skinks (a mere 60 point unit of scouting, march blocking, charge interrupting goodness)
-[Should] Another cheap character of some kind. Either priest (above) or a scar-veteran with a great weapon 'hiding' in a unit of saurus. Or two scar vets with great weapons. IN BOTH

Or even a sneaky ass skink chief on a terradon for charging silly mages who have gone into the open or for slaying war machine crew with his poisoned (With Venom of the Firefly Frog) spear, or shooting people with his three shot s5 shortbow (forgot name..magic weapon...35 points...magic item section).
-[Should] One or Two either salamanders or razordons or one of both. Don't take in units of more than one.
[eg. one razordon and one razordon as both individual rare choices, not one unit of 2, if you chose razordons].
Good luck with your army, whatever list you wanna take.
For the Old Ones.