1) how often i can input a wrong passwort / google-authenticator-code ?
Good luck guessing the Google Authenticator Code... it is a 6 digit code that changes every 30 seconds.
I'm not sure if the numbers ever repeat, but you could probably just type the same 6 digit code every 30 seconds for 30,000,000 seconds and maybe you'll get lucky and hit the code! That's only about 348 days...
As the others have noted, without the seed and/or the Google Authenticator... your coins are stuck... the Electrum devs can't help you, TrustedCoin can't help you...
NO-ONE can help you