No. The last chain is the one before that one.
Slip Stitch
Yarn Over.
Foundation chain. This is the first group of chains that you make at the start of a project.
Probably "spaces". As in skip spaces.
How am I supposed to know I’m asking the question here
yrn is the abbreviation for 'yarn' - the material you are knitting or crocheting with
Usually, rem would mean "remaining", as in, "for all remaining stitches" etc.
My grandmother loves crocheting.
If you mean do you have to purchase a crochet hook, no you don't. You can make your own. You CAN make a chain without a crochet hook, just using your fingers (just did it myself). Working into the chain without a tool would be more difficult, and would probably be more frustrating than fun.
It means decrease, usually by crocheting stitches together.
When a pattern refers to the "right side" of your work, they mean the side that is the front. The side that is the back will be the "wrong" side.