Is this engine based on the Toyota 1KZTE? I'm reluctant to pay the Peachment price for oil and diesel filters and would like to buy them from a Toyota dealer.
The engine is a 1KZTE and if you want service parts then try http://www.roughtrax4x4.com/index.php?doc=11&cid=910 i have used them for my service parts and they are a lot cheaper than Toyota main dealer. They have a good reputation with the 4X4 guys on the 4x4 forums.
The air filter... just go to a car parts / accessory shop - can't remember the name of the filter - but it's conical shaped and costs around £9.. compared to the £60 I was quoted by Peachment once!