How Do I Add Emojis to a TTF File?

FontForge

This tool is great for merging two TTF files. First download the font style you want. Obtain a TTF with emojis. Use this tool to merge the two files.

BirdFont

When you merge the two fonts together the sizing most likely will be off. So use this great font editor to resize the emojis. It's a tedious task but it's well worth it.