97 Lexus LS 400 has no forward gears

I recently bought my car and it drove perfect for the
first month. I've got every receipt from the owner
for anything and everything g that's been done to
the car. It suddenly paint go into any forward gears
only reverse. 4 codes popped up and we replaced
the appropriate solenoids, the sensors,  changed
fluids cleaned the filter, oil pan everything even
valve body. STILL no forward gears only reverse... I
am now a single mother with no transportation
blah blah blah. I can't afford a new(rebuilt)
transmission. The car run perfect before this. It
has close too 240 k miles on it, it's never been in an
accident  nothing. I've lost my job because of no
transportation and now living in a motel because I
couldn't pay rent due to losing my job because of
no car. Any input would be greatly appreciated