Transformations are like attacks, you have to learn them and it counts as one of the 2 attacks you can learn a week. All transformations are permanent if they are on this page. The Oozaru attack isnt permanent so it's on the Attacks page

Super Saiyan 1/Transformation 1/Super Namekian/Super Android
Pl needed - 50,000
Raises Pl by - 50,000
Raises Hp by - 25,000
Raises Ki by - 15,000
Raises Sp by - 20,000
Raises Defence by - 1,000

Ultra Super Saiyan/Ultra Transformation/Ultra Namekian/Ultra Android
Pl needed - 175,000
Raises Pl by - 75,000
Raises Hp by - 50,000
Raises Ki by - 25,000
Raises Sp by - 32,000
Raises Defence by - 3,000

Super Saiyan 2/Transformation 2/Super Namekian 2/Ultra Android 2
Pl needed - 350,000
Raises Pl by - 100,000
Raises Hp by - 75,000
Raises Ki by - 35,000
Raises Sp by - 40,000
Raises Defence by - 4,000

Super Saiyan 3/Transformation 3/Super Namekian 3/Super Ultra Android
Pl needed - 500,000
Raises Pl by - 200,000
Raises Hp by - 100,000
Raises Ki by - 50,000
Raises Sp by - 60,000
Raises Defence by - 8,000

Super Saiyan 4/Transformation 4/Super Namekian 4/Perfect Android
Pl needed - 1,000,000 and Golden Oozaru For Saiyans
Raises Pl by - x3
Raises Hp by - x2
Raises Ki by - 100,000
Raises Sp by - 120,000
Raises Defence by - 10,000