If you have a blown gasket it might cost about $2000-3000, depending on amount of tune-up which you have to have. If it's ok and you want just to replace it, it's about $500-600 (prices depend on city too).
No.
The 4 cylinder has a chain and the V6 has a belt.
The V6 uses a belt and the 4 cylinder has a chain.
You need to change the timing belt at 150000 km
Replace The Timing Cover Gasket
2000 Toyota Celica have timing chains.
No , it IS NOT an interference engine ( according to the Gates website - they make timing belts etc. )
Yes! Check out the threads on the Toyota Nation forums, especially the ones about stripped head bolts.
how much does it cost to replace the timing belt in a 1998 Toyota sienna.
You don't. It has a timing chain
You do not reset a timing belt you replace it.
The timing of a 2004 Toyota Sienna should at approximately 75,000 miles. Failure to replace the timing belt at the appropriate time can result in costly engine failure.