Easy to answer general question.

[†HøMø J£SüS†™]

Well, I am completely new at web development, but lets say I want to host a website on my home computer. I figure I need;
1. Apache
2. Php
3. Mysql

Once I get all of these, I need a domain name right? Well in my case I am looking to not spend any money, so what I was hoping to do, was get a free domain name somewhere, then rename it at dot.tk.

So what would I do, because in Apache there is all this stuff about redirecting to your IP and confusing stuff like that. Also, when putting in the site name with Apache, could I put in the dot.tk site name, or the free domain site name.

Another also, I have seen many free domain name places, but they all have free hosting automatically included, so if anyone knows of anywhere just to get a domain, please tell me.

One more thing, hehe, what ports would I need open to host my server?

[DAMINK™]

Download http://www.wampserver.com/en/ and install.
Go to no-ip and sign up for a free account and you get free domains. http://www.no-ip.com/
Download there client and run it on your system.
Open router and open port 80 to point at the local address (192.168.1.4) for example.
Then restart and your done.

Oh yea you might want to make a webpage etc after that lol.

[Idiot #1]

Make sure your ISP allows you to run a server. Most don't.

[DAMINK™]

noip can work around that. It will redirect to different ports. Not just port 80.

[Grizzly]

Thing is, you get caught your ISP will kick you off quick.