Can someone convert some things for me or point to tutorials

I'm looking to convert these two things. I'd appreciate if someone could point me to some tutorials or if someone had some time to convert them for me, I'd appreciate that as well!

classic.modthesims.info/d/546643


simplykitsch.tumblr.com/post/142858939772/do-you-like-undertale-its-be-super-cool-if-you 

I have the mesh for this one downloaded, i can't find it on the site, so I'll upload it to drive.

drive.google.com/open?id=1xYH-Sz6bQBp077lvNlFT0e2wgyxqNaMl