The guide from "The2kViper" is great info but here's something different about Resource Tokens for those wondering (like I was). Sorry in advance for the Wall of Text
I've currently only got the base game. I've got every Suit that requires Tokens, Suit Mod, Gadget and Gadget Upgrade and I've got the following Tokens left over.
26 Research Tokens
6 Landmark Tokens
5 Base Tokens
9 Challenge Tokens - I went for Gold on every Taskmaster Challenge cos it was fun
To unlock all the above you'll use every Backpack Token you get.
Crime Tokens can be farmed if you really want to however I recommend patience instead. Later in the game something happens (I won't spoil what) which leads to you getting a lot of them. I had more than enough Crime Tokens without ever farming for them.
The other point to mention is most forums describe some of the Taskmaster Challenges as pretty hard but I got Gold on them all fairly easy with one exception (one of the Drone Challenges). As the above shows though, you can afford to get Silver on 9 out of the 16 Taskmaster Challenges and still have enough Challenge Tokens to buy all the above.