Warmest of welcomes to the ODK forums, Afflicted.
1. I recently purchased a Rover Rancher and I�d like to know a bit more about its origin, year etc. Can anyone tell me from this engine plate Information?
model:261777
Type: 015601
code: 91080633
As Bushy has said, the year can only be approximated, from the engine's date of manufacture.
However, we can say that this machine was manufactured by Rover Mowers Ltd in their factory at Eagle Farm, Brisbane. Rover closed the factory in 2007, and the company was sold off to MTD Products Aust [a subsidiary of MTD LLC USA] in 2010.
The Auto-Drive system your machine has is also a uniquely Australian design [basically a copy of the older Greenfield drive system].
Once we have the machine model number, it should be possible to find an Owners Manual for it.
2. Just wondering if anyone can tell me if these feelings are normal within this community, or am I on my own?

Nah, you've landed among kindred spirits here at ODK.

You have done very well in picking this one up, I'd say.