Just bought an ’07 Rancher w a few probs…

Just looking for some feedback on some issues I have on a new to me Rancher, any and all feedback is welcome!

Question is just regarding the work that the shop called me about today that they say it needs… Ive had good experiences with them for a Yamaha jet ski in the past and its really the only place to take something to with a problem that’s local. Ive got no reason to think anything other than what Im being told, but would just like any feedback or thoughts regarding this atv’s problems as I don’t have a ton of knowledge or history with these.

For the smoke-(I did read into this a decent amount, assumed it needed new rings/pistons or top end rebuild)-it was a light blue, smoked in low gears and high gears if going slow. Smoked more in reverse…
Quote to "fix the smoke" issue-$800
2 gaskets, 2 seals, rings – .50 over, piston – .50 over
I was told the whole top end would be replaced, and that they would not be "over boring" the current top end…

The brakes were non existent, I knew that much…I was told that it needed new brake shoes – front & rear, pads, hand brake & foot brake cables, piston seal & piston (for brake?) and steering knuckle assembly-wheels.
The price to fix these issues was $779

I know Im the 3rd owner of this rancher, and the previous guy rode it every weekend on trails, and told me It was smoking a little, and the brakes were out…which is all true. I assume he stored it outside and rode it fairly hard as some of the plastic is faded and a couple of fasteners holding the fenders are gone, a few cracks in the plastic…

Somewhere in the above prices quoted, an oil change and fluid replacement, air filter replacement are included.

btw-its a TRX420FM – thanks!