2000 chevy s10 wont keep runnung many codes

i actually have a couple different problems with my truck and really need help. I did a scan on it and was told that there were alot of things wrong with my truck... I have a 2000 chevy s10 2 wheel drive manual 4 cyl and the codes that came up when scanned were P0178 flexible fuel sensor circuit low input, P1626 theft deterant fuel enable signal test, P1632 theft deterent system disabled, P0621 generator lamp terminal circuit, U1000 data link malfunction, and last but not least U1064 lost communication with control module