Hi __?__,

Let me understand this better.
Your old guy did the T-Belt with parts $600
Those parts were what exactly?
T-belt, water pump, Serpentine belt, tensioner, idler gear,
maybe engine seals.

Did you get two bills? Was the following $2800?
The drive axles include the CV joints
The brake line is a new issue?
Was there a front end alignnment?

The whining noise and sluggish is a mystery that you might ask the mechanics that worked on your car.
Yes, you should have taken the car to a mechanic before purchase for an inspection.
Yes, you should take the car salesman to court for selling a car with
an overdue timing belt job and a front end needing so much work.
Yes, there's a good chance that the car dealer might be responsible for your huge repair bill.
Yes, if you beat a predatory car dealer in court you're providing a public service.
You might ask the judge for additional punitive damages for all the time that dealer wasted for you.

Bill