1st,,,,,,,,,,,,,,,,,,, Stay away from BikeWorld,,,,,,,,,,,,,,,,,they know nothing about bikes.
Sure, they have a big fancy shop with lots of bikes for sale,,,,,,but thats it,,,,,,ive herd so many bad stories about them.
2nd,,,,,,,,,,,,,,,read your "HAYNES" manual 2nite till your eyes are bleeding and wont stay open.
3rd,,,,,,,,,,,,,,,I know a good lad in Co.Meath that will get your bike sorted propperly,,,,,,,,,,hes cheep and good. Ya want his number ???
The 2stroke oil you have is fine.
10w40 semi synthetic motorbike oil Goes in your gearbox,,,,,,,,,yes beside the brake peddel
The coolant ya have is fine,,,,,,,,,,,, get all the air outa the system
And lastly,,,,,,,,,,,,,,,,,,, read your manual !
Best of luck