Parked 15 years, need start-up help. Gas tanks, engine.

[C20mama]

Hi, trying to restore/revitalize a C20 that has been parked 15 years. I am concerned with the gas tanks, which seem to have rust lining peeling off - any ideas on what to do with these? New tanks? reline the old? what options are available?

Also, what should I do with the engine? Is there something to put in there to help then engine get going?

Any other tips you guys can give me on getting this 15 year old sitter up and going would be great.

p.s. this truck has cruise control - is that common or uncommon?

Thanks,

C20mama