This is simple, you will need to login to Google Analytics and then click on Admin at the bottom and then click on "Account User Management" and enter in the new user's email address.
Schema markup is a structured set of data for Google and other search engines and data collectors to see your products in a standardized format.
You can create a Cloudflare account from their website using your email address. Make sure to confirm your account by clicking on the link in your email after signing up. You will have limited access if you don't confirm your account.
Adding a "delegate" to your GoDaddy account is done from within your Account Settings, here are the instructions to complete them.
If someone, usually a technical person needs access to your domain names DNS records in Cloudflare, you can add them as a member. This provides them with access to make changes but doesn't provide ownership access. You can revoke access at any time, and add multiple people.