How to share internet using PTCL DSL and File sharing

AOA,
I am using PTCL broad band internet at home.I want to share internet on my 2nd laptop.please guide me that how may i do that.

2-My 2nd problem is I want to share file ,audio and video with both computer.How may i do and what things may I need to do ?

In short i want internet and file sharing .please guide me.

thanks.
gardenair

You need to provide more information:

  1. Are computers using LAN cables from PTCL modem or wireless from PTCL WiFi router to access internet?
  2. Are computers running Windows, MAC OS, Linux, etc.?