Error CS0019 Operator `+´ cannot be applied to operands of type `float´ and `WeaponObject´ Has anyone an idea? I'm new at unity and haven't any ideas!

welcome. you're more likely to get help if you post the actual code, not a screenshot. check the user guide for how to...

The code is located in the attached picture. @palahd, please format the code in the OP next time.

It seems like your currentWeapon variable equals an object in the start method which might do it depending on what Weapons[] is (According to the error it seems to name 'WeaponObject'). If you want a float to equal the index number of Weapons[] have a new float equal o which I believe is an int since it is used to index Weapons[]. But seriously, how can anybody tell what's wrong with this code until you show more of it.

@palahd doesn't it look weird to you that you are trying to add 'time' + 'weapon' together?

What should the result be when you add 2 seconds + assaulRifle ? Are you perhaps trying to add something like currentWeapon.reloadTime ?