AutoNation Toyota South Austin

I had a lot of work performed on my car. I went in for one thing but the sales person convinced me to do many others, which I was uncomfortable doing but I felt coerced and backed into a corner like there was no other option. I don't like feeling that way especially when Toyota was not going to help me out in costs. I still don't understand how spark plugs could cost $250. I looked them up and it's $13.20 each. That is quite a difference! The sales person said my rental would be deducted from my invoice. He went on vacation and didn't tell me he was going on vacation. I had to explain to a manager that was the agreement. It took a while but the manager finally agreed--thank you. The quote was not completely itemized. Labor cost more than parts. How do I know if everything was done? I don't. I know my main problem was fixed but unsure of everything else.