You'll need a collateral, and a job paying that probably won't suffice considering it's a car loan.
Yeah, this is correct. If you are looking to buy the car outright and get a 400k-500k loan you will need to put something up against the loan probably, or have someone co sign it for you, normally people use their house as collateral. Because these loans are secured, they are considered lower-risk by the lender. Because of this, interest rates may be lower than for unsecured loans, and the amount you can borrow is often higher. Repayments can also be spread over a longer term. However, if you fail to keep up on payments, you stand to lose the collateral secured against the loan, so that your creditors can sell it off and reclaim their money.
Then you have unsecured loans which do not have any collateral placed against them, and therefore it is widely considered a lower risk to the borrower, as they generally stand to lose less if they run into trouble with payments. They are typically available in smaller amounts over a shorter period compared with secured loans. That said, borrowers who fall behind on payments will still face consequences - in a worst case scenario, borrowers can receive court judgements which force them to repay the amount or face bankruptcy. In some cases the courts can even have the terms of the loan changed to become a secured loan, meaning it is still possible for borrowers to lose their homes or other assets.
Although I'm not sure if you really understand the process of buying a car, most people don't go to the bank and take out a loan for the full amount of their car. The method normally used is called Hire Purchase (HP) which is the legal term for a contract, in which persons usually agree to pay for goods in parts or a percentage at a time. You basically just pay the sum directly up in installments with added interested, the amount which you pay normally depends on how big, or small of a deposit you are willing to put down on the car itself.
Another thing you should probably take into account is your credit rating, this will have a big effect on whether or not lending business' will take the risk of lending you funds. It simply is just a report that evaluates the 'credit worthiness' of an individual and will play a big part in being able to take out any substantial loan.