Story Mode Intro
In story mode, I try to achieve 2 things. Earn True Jedi, and once that is complete, try to finish the level as fast as possible. This is often done by being very meticulous in the beginning and trying to get all of the studs. However, in some levels, you can just tear right through and barely worry about studs. At the beginning on my description for each level, I will include how to approach collecting studs the best way possible in each level. Do not worry about minikits or the power brick at all during Story Mode, unless they are extremely obvious and easy to get to. All extras are available in Story Mode.
Free Play Intro
Since True Jedi should already be completed, all you have to do in Free Play is collect the minikits and the power brick. I will provide explanations on how to get to each minikit, as well as the power brick. When you collect all of the minikits for the first time, you will get a 50,000 stud bonus. Just like in the Arcade and in some Bonus Levels, in Free Play, you pick one unlocked character at the beginning, and then you get paired with several other characters. Some of these characters will be the enemies/boss you face in the level. You will also have characters that cover all different abilities including a: grappler, Jedi, Sith, bounty hunter, high jumper, astromech, protocol droid, and an Imperial. To switch through characters, hold the profile in the upper left screen to bring down the menu of all characters available to you, and drag down to the desired character. All extras are available in Free Play.
Challenge Intro
In this mode, you have 20 minutes to collect 10 blue minikits, which I refer to as canisters. There may be in the same or similar places as freeplay, but there locations are usually different, and more obvious to spot. When you find all 10 canisters, the level ends automatically. Characters are selected in the same way as Freeplay. There are no studs in this mode, and extras are disabled. For the first completion of Challenge Mode, you get 100,000 with the gold brick you earn, as well as a 50,000 bonus for collecting all of the canisters.