No mods cost money
depends on the mod your downloading
You need mods. I would look on YouTube.
You can go on youtube. search for mods and then click on a video for mods then go to the description of the video and download in the links or you can go to minecraft forums.
You should download the mod that you want like christmass mods or else.
There is no blood setting in minecraft. That is only found in Gore Mods.
No they don't.
All minecraft mods are free. If you find mods that cost money, don't buy them. It is either a scam, waist of money, or both.
No, mods for Minecraft are completely free. However, they do have the potential to cause harm to your computer.
All minecraft mods are free if you have to pay for it its illegal. you only need to pay for a premium account.
Mods are Minecraft 'modifications' that people have made. They can be simple things like new creatures or new tools, or they can be complex, like expanded redstone functions, new dimensions like the Aether, etc.
None do, it's not legal to try to sell them.
Yes, as long as you don't use it with any other conflicting mods, or mods that cause the build craft mod to break.