Learn English – What does “to bleed something” mean

The trick to understanding this advert comes at the beginning:

Here’s introducing iDiva: Five Magazines in One

So the publisher is saying their magazine is the equivalent of five other magazines.

Also they are selling the first issue at a cut down introductory price:

At an introductory price of Rs 5 per copy

So, in their mind, the magazine is cheap even compared to a normal magazine, but because it is five magazines in one, the cheapness is exaggerated by that multiple, so this deal is five times better than any normal discount on a magazine, i.e. five times over.

"Buckle up!" is an instruction based on a verb. "Put your seatbelt/safety belt on!" It refers to, and is a metaphor for, the seatbelt buckle in a vehicle.

It is often followed by "it's going to be a bumpy ride." A seatbelt in a vehicle must be worn for our safety. Similarly, we (and/or others) must prepare for difficult times ahead when we read such headlines.

By wearing our metaphorical seatbelt, we are reducing the risk of figurative injury which may be caused by what the headline is predicting or of what detrimental consequences it is warning us about.

It was said to the two children in the movie Back to the Future III, just before the train departed.