Connects have had remote locking since they come out in 2002 (some didnt, but most did!)
Switch your ignition on and off 8 times and see if your door locks cycle. If they do, you have got remote locking, if they dont you havent!
If you have got remote locking, get a remote (square one, same as the mk6 transit) ignition on and off 8 times again, leave the ignition on on the 8th time and press one of the buttons on the remote wait for the lock to cycle switch ignition off and hey presto!! it should be programmed
For the side door not locking, check the contact pins at the front of the door and the B pillar, they may be damaged or just not making contact, if they are ok its probably the latch itself (ive done quite a few connect latches
)
p.s remotes are about £40 for ford