Thinking about buying the game

[Kodoss]

Also is there any gore in the game if you get hit in the cockpit

Your sight goes red, depending on your wound.

Oil splatter / bullet holes?

Yes and Yes.

Roughly how many different types of aircraft can you fly

GB
Hurricane (Mk.I 87oct./ 100 oct.)
Spitfire (Mk.I to Mk.II 87oct./100oct.)
Blenheim

German
Bf 109 (E-1, E-3, E-4)
Bf 110 (C-4, C-7)
Ju-87
Ju-88
He-111

Italy
G.50 bis
Br.20

Su-26M

Be warned, you need the newest PC generation for flying smoothly with all candy on.