robin,
Welcome to the Quilting Board forum.
There are a lot of badged machines so it would help a lot if you'd post a couple good pics of the machine.
But check the needle to make sure it's in right first. It should be set up one of two ways:
Flat to the right, threaded left to right
Flat to the rear, threaded front to rear
Also check the bobbin for correct insertion.
When the bobbin is threaded into the case and you pull on the thread the bobbin should rotate clockwise in the case.
Without seeing the machine I can't help much with the top thread path.
Joe