Here is what it cost me last month for a head gasket and valve job on my N/A, here in Calif Mojave Desert. Turbo model will probably be higher.
I did the R & R work myself. I don't push the car hard very often so I just went with stock gaskets and machine work.
I have a friend at the local Toyota parts dept. that gets me good prices, but the gasket set was going to be $260 (list $415), and $230 (list $350) from friend at favorite parts house. So I hunted around online and found an Ishino (OEM Stock) set for $154 (free shipping). I read an article that said Ishino is one of the largest gasket suppliers to Toyota, so I figured it would be a good one.
http://replacement.speedyperformanceparts....Head+Gasket+ Set
Machine shop work with a minimal cut to true up the surface, $425 (They adjusted the valves and put new valve guide seals in, too.)
Toyota factory headbolts, $36 (list $46).. (may be better to use ARP bolts.)
ALL new hoses, belts, thermostat, antifreeze, rad cap, clamps, $125
The center (#3) cylinder head gasket that covers the spark plug holes was $34, (list $44, Toyota Dealer Only).
So..about $650 in parts.
Labor and parts thru a reputable repair shop here would have been $1200-$1600.
I Hope this info gives you enough to get you going in ONE FUN CAR to DRIVE.....