What program to know how much data of internet i use per month on computer?

Im in canada and currently using the internet that is provided by the apartment complex here which is videotron. I might go and get my own internet bc i have internet problems and i hear about a company called bell that has internet without a contract b/c i need it for very short term 2-3 months only. Its about 70 per month when you factor in the fees and the activation charge etc if i get it for 3 months. I found out speed is 15/10 but i also found out there is a 75gb data a month usage. Im from the usa and used road runner internet and thus there is no cap at all.
I would like to monitor how much data im using per day. Then after 1 week i can estimate how much i use per month b/c i normally use the same amount of internet every week and im on the computer a lot. I browse sites a lot and refresh sites a TON and i know this would be using tons of bandwidth. I also watch youtube videos a lot as well and go on many sites… basically im online all day.
I would like a program where its easy to install and i would click on it and then it would say something like you used 5gb of data for today and stuff like if i checked i used 5gb for the day… then i watch a video on youtube for 5 minutes and then see how much gb i used total such as now its 7gb so i would know that 5 minute video was 2gb. Of course i have no idea how long a 5 minute video uses for gb so i just gave a random number.
I use windows 7 64 bit home premium. I had downloaded a program rpeviously but i had no idea how to use it. It basically didnt show waht i wanted or it did but i couldnt understand it.

try Networx http://download.cnet.com/NetWorx/3000-2085_4-10155904.html
This will tell you how much data you use by month, week, day, and hour. plus live usage.
And it’s free. It even warns you if you exceed your set limit. You can set and forget.
BTW, watching youtube will use around 700mb’s per hour.

Also i like to add that the internet in this building is shared the wifi. However… me and 2 other apartments have an ethernet cable connected to the router so us 3 are wired. So would this program only track how much internet im using since im wired or would it basically track everyone in this building since internet is shared. There are 2 routers downstairs and majority of the ppl in this building just use the wifi.

In step 2 it says please specify the internet connection you are using to the internet otherwise it would be wrong.
I see all connections, all ethernet connections, all dialup, wireless etc and then i see three of them that says
Atheros AR8131 PCI-E Gigabyte Ethernet Controller NDIS 6.20
Atheros AR9285 Wireless Network Adapter
Atheros AR9285 Wireless Network Adapter 2
And a few options that are Wan miniport IPv6, network monitor, IP, and PPPOE
Which one am i suppose to choose?

Probably this one: “Atheros AR8131 PCI-E Gigabyte Ethernet Controller NDIS 6.20” if you want to track only usage over the wired connection.

Is that specifically for my computer it detected? Or is that generally for the wired one that is connected?
So when i disconnect my ethernet cable from laptop and use wireless… is there a way to track that one? I assume its Atheros AR9285 Wireless Network Adapter?
So basically i will have 2 different ones so when wired… i can see how much data i use wired but once im wireless i can see that? Or its basically one option?

I suggest you tick ALL. My laptop is connected by wifi and it only picks usage that is from the laptop. It ignores usage from my desktop. The best way is to experiment and see what the results are.

Well the thing is i have no idea how much internet something uses so i cant really experiment if you know what i mean. My computer is a laptop but i have it connected to a moniotor and have \an ethernet cable connected to it so its basically wired like a desktop.

The program only registers usage on your laptop. It does not record usage that is not generated by your laptop. It doesn’t matter whether it’s connected by a ethernet or wifi.
Other people in your building can not effect the reading.