I have an ADSL line and I want to connect to internet with to laptops at the same time. I have a cable. I know I have to create a connection for these two laptops. Could anyone help me and tell me what to do?(step by step)

My daughters are turning 15, and we considered getting them each a laptop for their birthdays, but agreed it was way to expensive. We have to do big things like that x4 every time, so we’ll be waiting a little longer.
My niece is heading off to college in the fall and is receiving her first laptop in May at her high school graduation, since she’ll need one for college. She told me it was highly uncommon for teens to receive their first laptop this late.
What age should children get their own laptops?

Rocket French or Bust

I`m having a bit of trouble finding good laptops for under $250, and every time I do there`s either a catch or it`s not a good laptop so please help me, thank you.