For question 1 and 2, at the moment there is no feature like that on jkreativ unfortunately. You will require to do customization to make it possible.
Actually, we do some adjustment for Visual Composer to adapt Jkreativ feature, such as Row/section implementation. Please refer to this documentation in order to create multicolumn: http://jkreativ.jegtheme.com/documentation/#landing-page-builder and get into “How to add Column on visual Composer” section.
Please let me know if there is further support questions.