Can this car ever run again??

I have a 2003 MR2 Spyder with SMT transmission. I need some advice and/or
information to rectify the problems I am having with it. The car is in great shape and
only done 43,000 miles and I love it
The car has had regular fluid checks/oil changes/maintenance/etc.
I bought this car in March 2014 and was checked out by 2 mechanics that advised me  
it was running well and in good  working order.
As I only used it during the weekend,I have on put about 300 miles since buying it.
About 3-4 weeks after having the car, I wanted to improve the sound choices. I took it
to have it fitted with  a blue tooth device using the cigarette lighter port in the
cabin.After testing it out I decided not to go for it.
The seller removed it from the cigarette port and as he pulled(Tight) it came out with
the port.He pushed it back .I started the car and put it in gear and nothing happened.I
tried reversed and was the same.I turned off the car and called my mechanic who
services other car.He had no answers.I tried again and when I revved the car it moved
but sluggishly.I droved it home slowly about 8 miles  with it beeping most of the way
using all the gears, about 10mins later the beeping stopped.
I parked the car and left it for about 3 weeks .I got different  mechanic(mine was away)
to go for a drive with me started the car and drove 1 mile with the beeping and I came
to my house i put the reverse and the car came to a stop.So got the  code read  but
can not remember the codes, I think it was the sensors.He advise me to change the
clutch, reluctantly I said yes and a Toyota clutch was changed.
After the clutch change, we  started the car to test it but nothing just N showing, not
moving but if you put it in any other gear just beep..beep.
Left the car for another few weeks until my mechanic came back.He put his car
compute on Toyota and read the codes.
X431 DIAG Report   LAUNCH
SMARTBOX: 980244449600

Total codes 5
P0808 Clutch position sensor circuit high
P0810  Clutch Position sensor circuit error
P0917 Gear shift position circuit high
P0934 Hydraulic pressure sensor circuit low input
P0942  Hydraulic pressure unit
C1553 Processing when reset occurs during running.

So my mechanic said he was going to check the wiring, he said after checking he
thought it could be the computer transmission control.
There is no body that can definitely say , so I am not spending anymore money until I
get an expert to advise.I paid $9000 for this car and had 8 drives  in 3-4 weeks!

Please can you advise me?
Any help  would be appreciated ,Should I get it scanned again?Do you have to
reprogram me after a clutch change?What is a relearn?.Do my mechanic have the right
scanner?I do not want to take it to dealership as they are saying I need more part
replaced with unbelievable costs associated to do it.
My mechanic this week looking at the sensors and actuator assembly, what he found
was there are 3 same sensors in the assembly,one was broken, the other had weak
signals and the other was fine.Each cost about US 250, should I replace them with new
ones or should I go for the option :monkey wrench racing is selling a secondhand
complete actuator assembly with the sensors that was taken out of a working car for
about US700.What should I do???

I am searching for help and advice on either selling it , help on fixing it with
advise/expertise
IF ANYONE HAS IDEAS OR HAS HAD SIMILAR ISSUES WITH SMT - Please let me
know. I NEED HELP!