Yes you can, just use the editor. wheres the editor
Warcraft 3 World Editor, it should be located at your local Warcraft III file.
You'll need to have Warcraft III and its expansion Frozen Throne installed on your computer first. Then you can get the map from getdota.com, and transfer it to the Map/Download (create that folder if you don't have one) folder in your Frozen Throne maps folder. You should be able to open up Frozen Throne and play it, then.
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You'll need to have Warcraft III: Frozen Throne in order to play DotA. DotA is just a user-made map for Frozen Throne, and you'll have to download the map from getdota.com to play it. Just transfer the map file over to you Frozen Throne map folder and play.
Certain SotDRPs have it in quests
It should be in your Warcraft III folder. If it's not then your doomed.
Go to your Warcraft Maps Directory which is in C:\Program Files\Warcraft III\Maps\ then find the map that you want to rename. Right-click then 'Rename'. From there, you should be able to rename your map.
Warcraft 3 maps are by default melee maps unless you add more Triggers or player specific units, custom units...etc on the map...on the bottom right corner of the World Editor it tells you if it's either a melee map or a custom map (scenario) and the reasons why. Same goes for Frozen Throne.
Yes, DotA is free to play. However, you'll need to have Warcraft III: Frozen Throne installed before you are able to play the game. This is because DotA is a user-made map for Frozen Throne.
Since Frozen Throne, you can't get your hero level above 5 just by killing neutral mobs. You need to fight with other players. Also it is possible to lock leveling in map settings.
Defense of the Ancients, commonly known as DotA, is an Aeon of Strife-style custom map created for the game Warcraft 3. Originally developed for Warcraft 3: Reign of Chaos by Eul (US West), the map was later unofficially ported into the Warcraft 3 expansion pack, The Frozen Throne. Currently, several variants of the map exist under the name of DotA.
"Defense of the Ancients" cannot be installed, as it is simply a map file for Warcraft III: Reign of Chaos/The Frozen Throne, like Hands of Sorrow Knight, Battletanks, etc. You require Warcraft III and its expansion installed first.