Reddit mentions of Lepy 168HA 2.1CH Channel 2x40W + 1x68W Sub Output Super Bass Audio Digital Hifi Amplifier Color Black (Power Supply Cable not Included)

Yes, it will be per channel.

Wattage is largely irrelevant, the way powering speakers work is most people will only use a few watts per channel in a home environment. As you go louder, it takes exponentially more power to do so, it isn't a linear scale. Most speakers will produce 80-90db on only 1 watt.

The main concern is the resistance of the speaker, and this does matter. The standard is 8ohm and most equipment will expect this resistance. Most cheap speakers from Home Theatre in a Box systems for example are 4ohm, and could potential damage an amplifier if it isn't designed to support them. This is because a speaker of lower resistance will require more power to produce the same level of volume, so your amplifier has to work harder to power them.

The power listed on speakers is the MAX amount of power you want to feed them without damaging the speaker. Any more than that and you may blow them.

Large floorstanding speakers with lots of drivers may be bottlenecked by too weak an amplifier, but you could run most mainstream speakers off a 40 watt Lepy amplifier easy. Lepy amps are cheap as chips amps that are generally ment for car use, but are great for a cheap solution to power a couple speakers.

https://www.amazon.com/Lepy-Channel-Digital-Amplifier-Included/dp/B01AQARWHW/ref=sr_1_2?rps=1&ie=UTF8&qid=1480112573&sr=8-2&keywords=lepy+amp&refinements=p_85%3A2470955011

If your TV has RCA audio out than you can run it directly to the amp. If it doesn't you can use a simple optical to RCA adapter to convert the audio.

https://www.amazon.com/D03K-Digital-Analog-Audio-Converter/dp/B009346RSS/ref=sr_1_1?ie=UTF8&qid=1480112767&sr=8-1&keywords=fiio+optical

Or just get the receiver of choice :P

What kind of speakers are they?

This will work for 2 small speakers (say 6" or smaller single woofer).

This will work for 2 small speakers with a small sub.

There are better options out there, these are questionable quality, but if you just want cheap+easy, this will work.

It sounds like you have some speakers from a HTiB (home theater in a box) setup. Most of the time those speakers are not compatible with an AVR. Even if you were to luck up and have a set that is you won't have the sub. The problem is that sub is likely passive and modern AVR's only work with active or powered subs.

If you really want to use them you'll have to get a 2.1 amp like this LEPY LP-168HA $35 This should get you two speakers and the sub working. However, I don't know how good its going to sound but all you can do is try.