I just picked up lens tinting spray at the auto parts store for $13, tinted my side makers and 3rd brake light, can be used on all nights though if your looking to do that. I had used regular window tint to do it and that just looked crappy up close. I got halo head lights and smoked led tail lights on e-bay for less than $300 for all. Just gotta look around abit.
Not sure where your from, but if there are any flea markets around ya, I got my windows tinted for $110 with a 2 year warranty at the flea market.
I have been fairly successful with doing my car on a budget. It can be done.
I got a under light kit, street glow, at the auto parts store for $70.