First of all, you need to register and be a member to be able to submit a manuscript. After making sure that you have prepared your manuscript according to Guide for Author, please log in to the web site using your username and password.
On average, it takes four months from the time you submit your manuscript until you receive a concrete decision.
No, you cannot submit the same paper to more than one journal at the same time.
This journal does not charge authors to publish, and their articles are freely accessible to anyone.