Thanks Daani & Sammy!
I am 24, and I have earned my car myself. I have to save some more money to buy alloys, and do a little research too. I've heard it void's ABS's warranty.
The thing that matters the most for me is that I kind of like it now more than before. I didn't have to drill any thing to converting it back to stock isn't a problem, but the problem is I really like it this way. I am planning to put alloys plus new tyres too but will take some time.
Meanwhile those who think spoiler and the grille is bad, please look at these photos, and trust me, I am not the only one with these things: