Transmission problem. Options

[brandon702bmx]

Wow seems I can't win. So I recently engine swapped my Celica for a younger 5S. Filled the trans with 75W-90 synthetic gear oil (manual trans) I filled it up to the fill hole until it started spilling out. I let it spill out until it stopped and plugged it. I was driving it the other day and out of no where, I can not shift the car into 1st or 2nd what so ever. I was driving and I noticed something that sounded like bolts falling out of the car. So I pulled off and took a quick look... nothing. Drove the car to take it home. Hazards and right hand lane. Stopped at a stop light. Could not get the car into 1st or 2nd gear. So I had to start out in 3rd to get it home. I can get the car into 3rd, 4th, 5th, and R but I can not get it into 1st or 2nd. Even with the engine off. It also spewed all of the trans fluid out of who knows where. This is so irritating because I'm unsure of where I ****ed up... Is my trans shot? If so, is it repairable? Where can a get an affordable trans and why did this happen if it is something really destroyed... forgive me as I am newer to cars... I'm not completely ignorant but I'd say amateur. I could use some help.