Well, Garmin list the 265W as a discontinued product although they will still sell you a map for it ($180)
There are other options, the maps can be found at &
You may have to join to see the download links.
There are 2 listed, there is the 2016.10 Sensis & 2016.10 Here. The later will be about to be superseded by 2016.20.
Sensis would be what was on the 265W when you purchased it, Garmin have since changed map suppliers & both the Sensis & Here (Navteq) maps will work.
Short discussion on differences at
The link at Garmin for your 265W is showing the Here map.
Both maps are similar but not the same, different areas of accuracy & inaccuracy.
I use both as well as a couple of Topo maps, depending on where I'm going.
I'm sure your 265 W will work as you want, updating to a newer model would only be necessary if you want more features.
As for the Prado, you may have difficulty getting a map for it without going thru your local Toyota dealer, try at the above places, they may have them.
My tutorial on how to load the maps is here,
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