1. depends if your near top of server, although i think Nordeus have screwed up with this as meeting level above in Champions league when your suppose too play same level, but you should only go up one level

2, at lower level`s yes player`s value goes down, unless you saved skill point`s so when add skill it goes back up also before add skill re-new any player`s contract`s first as this will save money for signing on fee`s

3, will get back unless someone quicker

4, you get 2 player`s 1 is either 1/2 star so spend no tokens to sign so you can sell on or train a couple seasons and add skill and then sell on, the other will cost between 12 and 24 tokens, personally i release as i can get player`s in transfer market for less token