HELP: recover my btc funds though all odds against me. someone with Xtra knowledge?
i have found filenames "key.class(keypar.clas etc


Those are Java class files, they are software not data. They are no help in recovering BTC.

See https://multibit.org/help/hd0.1/files.html - you should look for mbhd.wallet.aes or mbhd-YYYYMMDDHHMMSS.wallet.aes etc.

That .aes filename extension implies the file is encrypted. If so, to decrypt it you must have either the password or the "wallet words".

Note Multibit support says:


  If you have really, truly lost or forgotten both your password and your wallet words then it is likely that you have lost access to your bitcoin.





  is there any out there that can help me?


I doubt it. I expect many tricksters will offer to do so.




  Is there any key file or something I can use for in some way export my private key?


No.




  some way to get my tranwqctions recovered if "transaction file" is recovered?


No.

Your transaction are not lost, theye are recorded in the public blockchain - every full-node has a copy of all transactions.

What you have lost is the private-key that gives control over the bitcoins in those transactions. Only you had the private key.