Hopkins says:
i have a bike, not that one off ebay unfortunately
tips on giving it a service please, it needs tlc as frame is rusty in places and gears, chain and all that need a thorough seeing to
kinda depends on what you have and how much you want to spend on it in time and money. you could spend £50 getting a front mech to work but then if you don't use it, there is no bother.
i wouldn't worry about the frame being rusty, its just cosmetic. as for the rest of it, a good can of wd40 or similar should get you sorted.