Information Technology

PHP is very easy to learn. It is a server side language used in making backends for the website. you can start with http://www.tutorialspoint.com/php/
and follow examples. also you need to learn SQL, . plus basics of html, css, javascript. tutorials of all can be found at the above mentioned site. once you are done with them, start with the demo project very simple form submission and data retrieval . that will really help you.

You should go for B.Sc Hons. It'll be better for you.

PCM group will give you the best options in the computer field as you can choose programming, software, hardware, administration, management etc

It depends on the eligibility criteria of a university you wish to apply though most of them are flexible with the core branches.

You can always go for courses like Ethical Hacking, web development, Hadoop etc.

It is just the nomenclature which changes. Not much difference. You can always compare the two syllabuses.