How can I plug in?

One assumes you are talking about the mains lead. What shape is the connector on the TV?

This is common. It is generally referred to as an "IEC" connector. Here's a 3 metre lead, although they are freely available in different lengths.

Right angle, to save space behind:

http://www.amazon.co.uk/Right-Angled-Angle-Kettle-Mains/dp/B00407YEE2

Straight

http://www.amazon.co.uk/World-Data%C2%AE-Kettle-Lead-S-T/dp/B00A4ARUYA/ref=sr_1_2?s=computers&ie=UTF8&qid=1458212502&sr=1-2&keywords=3m+IEC+lead

The other type it could be is often called a "Figure 8 connector". Here's a typical one:

Right angle, to save space behind:

http://www.amazon.co.uk/LINDY-Mains-Power-Cable-Angled/dp/B00W1BPS6M/ref=sr_1_6?s=computers&ie=UTF8&qid=1458212365&sr=1-6&keywords=3m+figure+8+lead

Straight:

http://www.amazon.co.uk/High-Grade-H05VV-F-0-75mm%C2%B2-Products%C2%AE/dp/B00OAJ6AOW/ref=sr_1_2?s=computers&ie=UTF8&qid=1458212365&sr=1-2&keywords=3m+figure+8+lead

Its vaguely possible the TV has a "Cloverleaf" connector. Here's a typical lead:

http://www.amazon.co.uk/LINDY-Mains-Clover-Leaf-Power/dp/B009VDVGVO/ref=sr_1_6?s=computers&ie=UTF8&qid=1458212502&sr=1-6&keywords=3m+IEC+lead

But I do have to agree with the other comments; its a bit pathetic that you couldn't e ven search for "mains lead" and look at the pictures. Learn how to use Google, for heavens sake!

Maurice
March 2016

Are you really that completely hopeless?

???
March 2016

Don't worry Angie - I'll nip down to the shops and buy a lead and come round tomorrow and show you what to do.

Or - you can get one from Amazon.

Good Grief...
March 2016