These are probably white mass which occurs after recovery of body from a viral fever or other diseases. Better use mouth wash and tounge cleaner to clean this.
The white bumps are usually just canker sores. Alternatively, these spots can just be harmless indications that one is not brushing their teeth (and yes) tongue enough.
These could be one of two things. They could be a form of painless canker sores. Easily treated with salt water rinses. Or they could also be thrush. Commonly occurs in babies, but adults can catch it as well.