i have ilr in my old expired passport i am out of uk for more than 8 years can i retun with my ilr to uk post say if i am allowed to in the ariport with stamping what i need to do after arriving uk will i face any problems getting employment ,can i bring my family

hi all i am currrently on ict tier 2 long term visa for three years but my cos generated for 1 year how can i extend my stay can i extend for another two years and ask my company to generate the cos for next two years ? also after two years should i go back to my country and apply for extension or c...