- if it's easily possible?
Yes. Set a value when the first switch is pressed, corresponding to the switch number (initial value should be 0).
Set another value when the second switch is pressed.
On each pass through loop, see if value1 and value2 are greater than 0. If so, send some data (value1 * 10 + value2 will say what to send). Reset both values to 0.
The reset switch you add (not the one on the Arduino) will reset both values to 0, to.
- if it needs more than a basic arduino, and any arduino? older ok?
It doesn't. Any Arduino will do.