A: 1: Yes, it should only pull from what you give it. However, there is a checkbox in the chatbot config that would let you allow it to go outside its Knowledge for answers. But you have to turn that option on for each chatbot.
2 & 3: Right now our website integration is the chatbot widget. We also have the playground feature when you are logged into tymbot.io that lets you use it like you would chatgpt or others. If this is a feature you are looking for, would you mind sending us an email at info@tymbot.io and let me know what your use case is and i can add it to our roadmap.
Bonus: We have an API that you can use if you wanted to build your own interface. Under your account, there is an API Keys section that also has a link to our API documentation.