I just downloaded and synced bitcoin Core.

So what address do I use to receive bitcoins?

It doesn't seem to tell me what it is.

When I click request payment, it generates a new address every time.
I don't want a new wallet address for every transaction. I'll never be able to keep track of them all.

I just want one address to use with this wallet. Is that even possible???

What am I doing wrong?

I went to http://coingen.io/ and started a new cryptocoin. Now I need a full-fledged peer-to-peer network, a pool and an exchange.

Any help on how to do that?