Chosen Solution

What size of wrench/socket is needed to remove cover?

Well that depends on the size of engine u have . (I’m sorry if my answer sounds rude kk) Now, hopefully u have ur Sockets still in their boxes that they came in. If u do just use ur common sense and take one socket that u might think will fit. If it doesn’t then try another one. And eventually u will find the right one that fits.

the cord you pull to start the engine is locked . What do I need to do to free the cord?