To obtain PayPal credentials (Client ID and Secret) for integrating PayPal payment method in your system, you need to follow these general steps:

1. Create a PayPal Business Account: If you don’t already have one, sign up for a PayPal business account on the PayPal website.

2. Log into Your PayPal Account: Once your business account is set up, log in to your PayPal dashboard.

3. Access Developer Tools: Look for the 'Developer' or 'Developer Tools' section in your dashboard.

4. Create an App: In the developer section, you'll have the option to create a new app. This is necessary to generate API credentials.

5. Generate Client ID and Secret: After creating the app, PayPal will provide you with a Client ID and Secret. These are the credentials you'll use for integrating PayPal into your system.

6. Configure Sandbox for Testing (Optional): If you want to test PayPal integration without real transactions, use the sandbox feature in PayPal’s developer tools to generate test credentials.

Remember, keep these credentials secure, and don't share them publicly. For detailed instructions and assistance, visit PayPal's official website or their developer documentation.