Just a guess but I figure my 3rd gen is in about the same situation.
It has 240k on it now, and I have records of oil changes, tires, and batteries from the PO but nothing beyond that. Last timing belt recorded was around 60k. If I go by that the timing belt is at 180k or so.
Now stuff may have been done I don't know about. I've only had it since January, and my records are a mixture of receipts found in the vehicle and Carfax/Toyota records. Something to go on but not necessarily complete. But by and large everything I mess with looks like I'm the first to touch it.
The weather is just now starting to be consistently pleasant enough to encourage me to work outside or in the garage. I've been hitting here and there at it, so I'll get to things when I have time. But hell, I'm driving it in the meantime, I didn't buy it for a project, I bought it to drive and drive it shall.
If I did everything to catch up it needs at once that would be a hefty chunk of change and a lot of work to do. I'm going to take it one thing at a time, unless it's stuff I can do while I'm in the area I might group jobs. I have a list long as my arm and growing of stuff I "should" do PM on, but honestly, it runs and drives fine right now.
Only thing I have a complaint is it shifts a tiny bit hard between 2-3 and there is a intermittent shake I can't pin down that is either bad shocks or the transmission stumbling, but it's so slight I can't put my finger on it.