Thats a lot of money to fix valve cover gaskets.
Get these, call toyota and get the valve cover gaskets and do that yourself. It's not hard. Just remember where all the vacuum hoses go.
The belts arent that hard either. Just get the correct sizes and replace them. Everything should be around $150 if you do it yourself. Belts are probably gonna be $25-30 (3 of them) each, i think the gaskets are $20 each, and those bolts are $32.