As far as "look outs" go, visit the Mechanical Troubleshooting section of the forum and dig into the Toyota 7FGU and 7FGCU threads to see what has been bugging others.
If you have no stomach for that, then just wait until you have a specific problem/question and post up at that time.
At 12,000 hours, it should have a few aches and pains if it has not been maintained fastidiously.
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