Thanks very much for your reply ... I have a mechanic who will be doing it but I am not too sure whether he has encountered anything like this.
I am trying to help by getting things set up
To be fair I hardly ever have used the car and must have only done 1k miles since 2008 ! But I think it needs changing anyway!
There is a holding tool on eBay...& a 22mm impact socket will be needed along with a couple of 5' breaker bars!
https://www.ebay.co.uk/itm/Harmonic-Damper-Pulley-Holding-Crankshaft-Crank-Holder-Tool-for-Lexus-Toyo-3-0/114059818566?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160727114228%26meid%3D3c61e87d0945456f8881ba8413b38930%26pid%3D100290%26rk%3D1%26rkt%3D4%26sd%3D114059818566%26itm%3D114059818566%26pmt%3D1%26noa%3D1%26pg%3D2060778&_trksid=p2060778.c100290.m3507