You haven't really given enough information to formulate a comprehensive answer, for example; a) was the helicopter hangared during the lay-up, b) were the intake, exhaust and pitot covers fitted and in good condition, c) were the main and tail rotor blades tied-down and, d) was any preservation performed at commencement of lay-up?
Two things for sure, the TT straps and the ELT battery require replacement. Check the maintenance records for any other calendar maintenance that is now required.
If the helicopter, particularly the engine, was NOT preserved them expect some 'gumming-up' of the fuel in the FCU (disconnect the hose at the fuel nozzle and do a wet motoring run - you may have to do this a few times to get fuel flow) and the hydraulic oil (if you experience a slight 'jerky' feel as you turn the main rotor then the hydraulic pump is gummed-up - don't worry too much as this will 'clean' itself during the initial run-up).
Perhaps a good guide to getting the helicopter up-and-running will be the use the de-preservation requirements of the airframe and engine maintenance manuals as guidance (whether or not it was preserved to start with). My personal opinion is that, as a minimum, you should consider a good in-depth 100 hour inspection together with a complete oil and filter change, including the hydraulic oil and filter
Finally, clean the windscreens and windows VERY carefully, any dirt MUST be WASHED off thoroughly before any wiping is done or you risk serious scratching.