Having issues with getting a morph system to work. Anyone able to help?

So a little bit of backstory,

I'm making a firefighting themed game, and I decided to make blocky turnout gear, meaning the clothing firefighters wear into fires was made with parts, over clothing. Now, my only drawback, is how I don't know any way to script. I'm just wanting some help with figuring out how to: 1. Have the player click a block to get the gear. 2. Have the gear actually work on the player. 3. Have the player being able to walk and 4. Have the click being on a part, which would be on the side of every truck (If possible)

Thanks for taking the time to consider,