Low cost Controller for X,Y steppers and 1 12V solenoid port?

i am making XY plotter and i am new to this field.i have questions for building RAMPS1.4 like board for arduino UNO.
which firmware to use for XY plotter with arduino Uno only as it has minimum Flash and all i need to do is drive two motors with A4988 stepstick stepper motor driver(Polulu) and make Pen assembly Up/Down.

I am refering arduino mega and RAMPS1.4 shield but i dont need that much port so want to reduce it for 2motors and one 12Vsolenoid(electromagnet)

*as per my study i can use Fan port of arduino Mega (D9) to control solenoid but i am confused about how can i make it happen with arduino Uno board.

You should look at GRBL that will run on the Arduino Uno.
This does not have all the extra code for extruders or heated bed which you do not need.
[github.com]

I was thinking of GRBL firmware too.but the problem is 'how to make pen assembly Up/down?'

can you help me out in interfacing Solenoid with arduino?

google is your friend http://lmgtfy.com/?q=http%3A%2F%2Fplayground.arduino.cc%2FLearning%2FSolenoidTutorial

I know arduino interfacing with solenoid only.

You didnt get question-
I am asking about interfacing arduino with solenoid so that it can work with appropriate G/M code.
In grbl firmware they have shown where to connect which pin as in step pulse x axis to digital pin 2.
But there is no such connection with solenoid.

See the following image

If should be useful, this is one of my last project

[fabacademy.org]