hi guys!! noob here needing rim fitment help.

[art1618]

New to the site I traded my wife my 2011 Nissan Juke for her 2010
Yaris hatch. We had a baby girl and it was easier for her to take the baby seat with the second set of doors on the juke plus a wee bit safer.
I'd like some help with finding a perfect match for my yaris.

I'm looking around for some rims I found the set I like on eBay
Xxr 530's.
Available in 16-17" dia. And multiple widths and offsets.
I'd like to know how wide I can go both front and rear I can have the fenders pulled about an additional 1-1.5" on both front and rear.
I want to keep the overall diameter of the stock wheel.
Mostly interested in a 16" but if I can go wider 17" will do.
Also not only do I not understand offsets but I don't quite catch on to tire dimensions.

So far only going to upgrade to stiffer springs and lower 1.5" to hold the sound system I'm planning to build in the back where the seats and spare used to be.

If anyone has a decent front sway bar, strut bars for sale I might be interested.
I did use the search option to not try and repost this question that seems to be asked everyday, but my question seems to be a bit too broad.

Thanks in advance for the help!!