Answer 1

I think you have to start to learn the concept of programming.
For front end web development you can start from the following:
1. HTML & HTML5
2. CSS & CSS3
3. JAVASCRIPT
You should have to do practice more on the above suggested
Back end web development:
1. It is your choice that what language you have choose for server side scripting there is the option PHP, ASP.NET, Python etc. ( I was chose PHP in first)
Note: It doesn't matter that what language you have choose. You have clear the core concept of the language will the matter.
After learning the core concept you can easily switch the language. Mostly the concept will remain same, only syntax will change.
2. SQL for database management
After that you can learn the Bootstrap that will be use for responsive design.
Hope it helps :)

Answer 2

Utkarsh thanks for appreciate my answer😊

Answer 3

Front-End-Development
1. HTML, CSS, JavaScript
2. CSS preprocessors (Sass/LESS)
3. JavaScript frameworks (Angular, Ember, React) and JavaScript libraries
4. CSS frameworks (Foundation, Bootstrap) and responsive design
Back-End Development
PHP, Ruby on Rails, Python, or ASP.Net