I have 2 queries

Hi, I have 2 questions: 1) I would like to change the subtotal text to the word price at checkout. 2) I have a motorcycle sales site, I would like the cost of all motorcycles to be, for example, 350 euros… since it would be a reserve value… That is why I want to keep the normal price of each product and then when making the payment I only charge you 350, which would be the reserve