Yes. You can change this by managing your free trial subscription at id.unity.com.

If you’re over your default limits, you’ll need to to reduce the amount of capacity being used, or agree to purchase up to the amount of your current usage. If you don’t, you will not be able to publish changes to cloud storage, but you can download the project, and make changes to your local version.

Submit your question to support.unity3d.com and include “Unity Teams” in the subject line.

As many as you need. You will be charged for the amount you specify when your free trial ends.

Your trial comes with 25GB of Cloud Storage. You can purchase more as necessary.

From id.unity.com, select your Organization, then, select “Service Usage” from the left-hand menu item.

Like Unity Plus/Pro subscriptions, Unity Team seats are subscriptions assigned to members by their Unity Organization. Learn more about organizations.

For Unity Team Basic users, the latest version of your project and 90 days of history is accessible. At least 1 year of project history is kept, all of which is accessible should you upgrade back to Unity Teams Advanced.

No. Creating builds in the cloud with Unity, either automatically or on-demand, is a Unity Teams Advanced feature.