How do I animate complex characters?

I am wondering how to animate complex characters like the ones in Tomarty's Animation Test Lab. If anyone could give me any useful information it would be much appreciated! Thank you! Note: I have minimal scripting experience. However, I learn fast and have a near-photographic memory. Plus, my dad is a programmer at HP, so I have some experience in other languages, but not much in Lua.

Well, for one thing you can use the Animation Editor by ROBLOX and add them into the basic character animations. But if you do you will need to get into the basecharacter and find links to the starter animations.

You can also use this with other parts like a 17 legged monster.