What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
There's no import option for templates. If there's a template you want to use, all you have to do is use it from the Templates Gallery.
Complete guide: How-to-use-the-form-templates
On the other hand, if you have a JotForm template from someone else (e.g. a friend or a colleague), he/she can share the form on the Template Gallery so you can use it.
Complete guide: Sharing-a-form-in-the-form-templates-gallery
Or, just clone the form which IMO is much easier.
Related guide: How-to-clone-an-existing-form-from-a-URL