Hope this makes sense

Both my Dad and I have computers - him a laptop and myself a Desktop PC

Now, We are now able to receive Broadband, Is it possible for both of us to be on the internet at the same time without conflicting eachother?

Also he wants a wireless connection and he likes Wanadoo, they sell a wireless kit for £79.99 and £39.99 for an extra wireless thingy (can I use that on my Desktop??)

I presume we'd both need to be with the same service provider and have a secondary email address for one of us yeah?

If someone could explain it to me I'd be very grateful