Can you plug in an electric guitar and amplify it? I read this in first place because i don't have an amp for guitar.?

Yeah-buy some cheap amplified speakers and a headphone adapter from 6.3mm to 3.5mm. Plug that into your guitar, and plug the other end into the speakers (you will need some extra cable). Turn the speakers on full and jam! (You will not get much volume)

Yes. Electric guitars need to be plugged in to be able to hear it. Now if you don't have an amp where do you want to plug it in at? I plug mine in my stereo before when I didn't have an amp. Is that what you wan't to do?