To solve this problem, we need to analyze the given series of letters and symbols:

T O @ $ J $ S € M L I * N G © Y & T P £ Y T

We are tasked with finding symbols that are immediately preceded by a letter and immediately followed by another symbol. Let's count such occurrences step by step:

1. Symbol '@': Preceded by 'O' (letter) and followed by '$' (symbol) - Condition satisfied.
2. Symbol '$' (after '@'): Preceded by '@' (symbol) - Condition not satisfied.
3. Symbol '$' (after 'J'): Preceded by 'J' (letter) and followed by 'S' (letter) - Condition not satisfied.
4. Symbol '€': Preceded by 'S' (letter) and followed by 'M' (letter) - Condition not satisfied.
5. Symbol '*': Preceded by 'I' (letter) and followed by 'N' (letter) - Condition not satisfied.
6. Symbol '©': Preceded by 'G' (letter) and followed by 'Y' (letter) - Condition not satisfied.
7. Symbol '&': Preceded by 'Y' (letter) and followed by 'T' (letter) - Condition not satisfied.
8. Symbol '£': Preceded by 'P' (letter) and followed by 'Y' (letter) - Condition not satisfied.

After checking all occurrences, we find that only one symbol ('@') satisfies the condition of being preceded by a letter and followed by a symbol. Thus, the correct answer is 1.