When you originally created the wallet before you sent any coins to it, you should have been given the seed by Electrum , which you should have written down... then you have to re-enter the seed to confirm you have written it down correctly... and then Electrum will ask you to create a password for your wallet... the wallet is then created. If you created a new seed, that will NOT enable you to recover your coins, that will be for a new wallet.
If you are 100% sure that you have the seed for the wallet with coins in it... do this:
Step 1. "File -> New/Restore", enter a new name for your wallet like "RestoredWallet", DO NOT use the same name as a previous wallet. It should tell you the file doesn't exist, click "next"
Step 2. Select "Standard Wallet" from the list and click "next"
Step 3. Select "I already have a seed" from the list and click "next"
Step 4. Enter the original seed that you got when you first created the original wallet and click "next"
Step 5. If you want, you can enter a password to encrypt the keys and/or wallet file. It is recommended to do this, but if you REALLY don't want to use a password, leave it all blank and click "next", just be aware that by not having a password, anyone that gets access to your wallet file could get your private keys.
Electrum will then recreate your wallet, using the seed and you should see all your transaction history and current balance. You should then be able to send coins using the password you just set up (or without entering a password if you didn't set one up)
NOTE: If you do not see the transaction history and correct balance, then you are attempting to restore using the wrong seed.