You wouldn’t usually “lease” a car for private use, a PCP is usual Personal Contract Purchase
Pay a Deposit, choose repayment period say 3 or 4 yrs
Interest rate will vary from 0% up to 10%, more on a S/H car.
There will be a “residual” payment at the end often around half the original cost, YOU can decide to pay that or hand the car back
My current car is 0% interest so I use PCP and leave the money in the bank. Probably 90% of new car private purchases are PCP. The finance company will check your bank records or accounts, it might be a problem for those retired to show enough income to cover the repayments.