it is easy to get to the Termini terminal in Rome?

To get from the aiport to termini station, you can take:

1) the train (leonardo express), that costs 14 euros and takes 32 minutes to get to termini. It leaves every 30 minutes.

You can find the timetable in the site www.trenitalia.it (look for fiumicino aeroporto - stazione termini).

You can buy tkts at the automatics machines or at the tikts office, as you get to the terminal.

It's easy to find, because, after the glass doors near to the babbage rollers, there are the directions (take the lift)

2) the bus shuttle, that costs 8 euros, and stops at termini and, then, at cavour square, near to the vatican.

You can buy tkts on board.

Here is the timetable:

http://www.sitbusshuttle.it/images/pdf/orari_bus_s...

It's pretty easy to get to Roma Termini from Fiumicino airport. The Leonardo Express train runs between the two stations with no other stops en route (twice per hour). The trip costs 14 euro and takes 32 minutes. The train consists entirely of 1st class cars. Just follow the signs for the station at the airport.

You can find specific schedules here - use Fiumicino Aero for the airport station: http://www.ferroviedellostato.it/homepage_en.html

Buy your ticket at the official Trenitalia counter. If you buy from an agent counter, you have to pay 2 euros more. But of course, if you don't have the time, then you pay the additional 2 euros, cause the queue at the official counter is longer that the agent queue.

Basically, it is extremely easy to get the train. Just follow the signs and you should have no problem getting to the train platforms.