Investments in a startup - how to make out?

Suppose your startup is working or the idea is stunning that an investor is found, there is money and there is not enough important detail - how to formalize relations with an investor and what is more interesting - how to formalize relations with a domestic investor.

Founders are usually not up to paperwork, I want to quickly get funding and go to work. But life teaches that this stage cannot be neglected.

In most cases, the one who invests wants a significant or control (> 50%) share. In this case, the project organizer is worried, there are concerns that control will be lost and the whole event will go in the wrong direction (or just go to the side).
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I invite habrovchan, especially with the experience of attracting or investing, in the comments to answer the question - what important points must be written on paper?

These are the moments that come to my mind:
0) The order of investment - how to make out the money, how to prescribe control over costs.
1) The separation of roles in management - who, what decisions and in what composition are taken.
2) The preservation of intellectual property - the creation and participation in similar projects.
3) Profit making - when you can “get” a profit
4) The safety of the founders - in a broad sense, from the usual “kidka” to conflicts with the investor.
5) If an investor wants more than half (a normal desire for a person with money) - how to compromise?

Bottlenecks and pitfalls are clearly more. Leave a comment - with what problems encountered and how they are prescribed in the documents?

PS: I checked Google - there was no specifics.