How do I read Bond Offerings, what do all the different numbers mean, Coupon rate vs Yield etc.

Title says a lot.

Are these instantly redeemed as cash on the maturity date? Can I rollover the interest into the bond during the term or does it just pay cash?

Yield
Price /$100
Coupon rate
Rating (is high or low better?)

Basically how to buy a Bond and what do all of these numbers mean