A:
Simple! If you're television has HDMI inputs (like a majority of the newer model TV's have) you're one step closer to getting that connection working. Now, make sure that you're Lenovo laptop has an HDMI output as well, and all you'll need is an HDMI cable to connect them both. Pretty simple stuff.
It differs if you don't have HDMI on either console. Then, you'll have to look for a VGA connection (those older, blue colored monitor cables/connections) on both devices and get the proper cables to get the connection going.
If there is no match, you might have to resort to getting an adapter for your computer. Example: a USB to HDMI converter. These converters are not usually cheap (as you have to buy the cable separately) but they can get the job done.
I hope this answers your question!