FINALLY OUT OF HOSP NOW BACK TO THE 16V CONVERSION

well after being in hospital for 3 months the day finally came when i got(TODAY) WOOHOO!!!. Now before i went in, erm must of been just after inters this year. all the ppl i spoke to i said i was going to do a conversion. now knowing little about the actual conversion, ive got a friend who will happily do it for me, however ive managed to get  
the engine block and cylinder head and ecu. but ive not got loom,alt,starter. the guy im buying the engine from says i need the injection, which part is this and how much will it cost. as for everything else, is there anything else i will need to do the conversion. many thanks Genez