1. Download shop manuals if you haven't done so already. If you have the paper copies then even better but those have been NLA for a few years now. Used examples pop up every now and then for sale.
RM183E for body,
RM172E for engine
EWD168F for electrical
All three above can be downloaded here:
Land Cruiser Factory Service Manuals (FSMs) - https://www.cruisercult.com/factory-service-manuals
2. Check if timing belt has been done but I would just go ahead and do it for peace of mind. I think it is every 100K.
3. Familiarize yourself with all of the parts sources.
www.partsource.com,
www.amayama.com, and
www.megazip.com are popular online sources
Dave Stedman, Japan4x4.com - Canadian living in Japan that imports/exports all kinds of stuff
www.buyee.jp - Proxy service for yahoo auctions, yahoo store, mecari, etc. All JDM market sites where used parts are often sold. Create a text file of search terms in Japanese. I had a really good one but lost it. Been building that back up somewhat.
4. Change all of the fluids, tires if needed.
5. Drive and enjoy
This forum is a great source of information. Some people venture over to the facebook groups but I personally find those groups cumbersome and hard to navigate for tech and tips as it is mostly just chit chat stuff. Could never get used to the structure of it all.