MSRP, not much. Toyota is cutting back production across the board, so there won't be excessive inventory. Typically Toyota doesn't offer any incentives with a brand new model/generation. But with the slump in the auto industry and if it continues, I say mid 2010, there'll probably be rebates, low APR financing and leasing. As an example, the 2005 Tacoma had no incentives and IIRC, not even the 2006. The 2009 Corolla didn't in the beginning, but mid 2009, there were rebates on it. Furthermore, the Corolla is a fuel sipper it's easier to sell than a truck or SUV.
With production being limited, I think choices are going to be limited, but I don't expect the demand to be any where close to the FJ Cruiser's debut or the 2nd gen Tacoma. I don't think there was ever a waiting list for the 4Runner. But a good number of 4th gen owners, including myself, waited on special orders.
They might throw in all weather mats (they don't hold up, get WeatherTech or Husky Liners), maybe first oil change is free, lifetime 10% discount at their parts dept. Possibly some type of protection package for the paint and interior. I would pass on all of it.
Extended warranty, you can buy it from a member here. It's was $800-1000 for Toyota's Platinum Warranty with no deductible. Might be worth considering for a first year model for the extra piece of mine. (I don't see any brand new technology that's not been offered on another Toyota, so I think the features present in the 5th gen have been worked out. The V6 is an updated version of the 4th's with dual VVT-i, which has been widely used in Toyota's car applications.) However, Toyotas historically have been pretty good for first year models and redesigns.
