How to poke coaxial cables out of a wall nicely?
Shopping
They sell modular wall plates in 1 to 6 port flavors.

Pick up as many as you need from the local home improvement store. Grab some F type modules, and some low voltage brackets while you're there.

Installation

Cut a hole in the wall large enough for the low voltage bracket to fit.
Install the low voltage bracket.
Shorten the lengths of cable, and add new connectors to the ends (you'll also have to buy these from the home improvement store, so go back and get them).
Connect the cables to the modular jacks.
Install the modular jacks in the modular wall plate.
Install the modular wall plate in the low voltage bracket.

Holey VS. Pointy
The pointy connectors are &quot;male&quot; connectors, whereas the holey connectors are &quot;female&quot;.  When a male connector loves a female connector very much... You get the picture (I hope).
Why so many?
There is no way to say for sure why there are so many cables here.  It's possible that some come from somewhere, while others go somewhere else. You'll have to trace the cables to determine where they come from, or where they go to.
For this a cable tracer such as the Gardner Bender Wire-Tracker, can come in handy.