I'm really sorry to hear about your Dad passing away Mart.
The prices on NTL as from February are shown here:
http://www.whycable.co.uk/pricechanges/ntl/
There is a package price for TU, 4MB internet, and Family pack which shows the cost as £49.99. You'll need to check on the bill if you are on a package value pack price, and if not, speak to Customer Service and see if you can be changed over.
There may be extras - phone calls to numbers not included in Talk Unlimited, Video on Demand movies, and any additional subscription channels that may be included.
I'm sure someone will advise you about the requirements when speaking to Customer Service, as your name won't be on the account, and you will need to give the password.