If its a jzz30, Ive done a couple now, and basically, what you'll need is a bucketload of cash. If you're not doing the work yourself, make it a wheelbarrow full
Its not hard to do, but IS hard to find the parts, unless you have contacts and know where to look, in which case you probably wouldn;t need to ask
Totally Toyota in New Plymouth is a good place to start - talk to Trent about price and availability of a conversion kit. Also check out
www.soarercentral.com - an aussie site which will have all the info you need
Its a really good conversion - transforms the car, very worthwhile IMHO
