New Car! with a few issues...

ok so i just bought a 94 Mustang GT 5speed, it has a 115k miles on it, headers, exhaust, 3.73's, short shifter, intake, along with other goodies. So i get it home and im testing some things out and I find out it needs a new right turn signal bulb because it makes the fast click noise and the rear bulb blinks fast and front doesnt blink at all, so i swap it and nothing. So then i swapped in a new flasher. So im assuming it must be the turn signal piece in the steering column because after swapping all this stuff and fitting the ground a little better the turn signal works if i lift it slow, but if i do it fast or push it too far up it stops. Also, kind of bad, but the iginition will turn without the key in it, i can start the car and everything with no key. Im assuming i need a new ignition cylinder too then? I have a friend with a garage who will let me use it but i need to know what parts i need to fix first.

thanks in advance, help would be much appreciated.

ya i checked the ground, that headlight's ground had paint beneath it so i shaved it to the bare metal and it helped because now it will turn on, sometimes... i think its the switch in the column because it will turn on sometimes but if i push the lever too far or too fast it will turn on then shut off.