Inexperienced first buyer. Inspection results on duplex poor

[Max Axelrod]

Hello, 

I am a first time buyer and I am considering  at a duplex. I just had an inspection and there are many issues with the property such as water damage in the basement, roof in bad shape, mold in attic, old furnaces. There are current tenants in the property. Are there any opinions on whether or not to hire a general contractor to make repairs if seller provides necessary money or would this be too much work for a first time home buyer? Any other thoughts?

thank you! 
Max axelrod