Regular gatcha will sometimes give you character fragments instead (looks like a puzzle piece with character portrait on it), which can be used to unlock the actual character when you have enough pieces, or if you already have the character, you can use them to rank up the character. A-rank character rate is around 5-10% which can also be farmed in about a month of grinding. Regular gatcha's S-rank character rate is around ~0.7% (not verified), and this is the only way to obtain S-rank characters (except for S Sakura and S Bronya). Equipment gatcha has a rotation of equipments it will contain, so its a good idea to save your crystals until it contains the perfect equip for your hard earned characters. Currently, Sakura is not available in the regular gatcha. Regular gatcha contains both characters and equipment. Each roll will contain two items but only one of them will be what you are looking for the second item will be mats (exp/evolution/gold). Sometimes there will be an event gatcha between the second and third option.
There is the regular gatcha (top), equipment-only gatcha (second), and friendship gatcha (third).
