Ive just got a mini disk player and its comeing up toc error,can you help me please

Probably not. There are various reasons that TOC errors occur, some are fixable and others not, but Sharp MD units were really known to suffer from them for multiple reasons all at once. TOC means Table Of Contents; it's an index file on the disc which tells the host machine where everything on the disc is located and the TOC is modified whenever you edit a disc. Sometimes the file gets corrupted, but often the machine itself simply becomes unable to read the disc and as the TOC is the first thing it tries to read then you get a TOC error.

If you're lucky the TOC error is limited to a single minidisc; if this is the case then it's just one faulty disc and although there are ways to perform TOC cloning they usually involve hacking the host machine in various ways which may cause permanent damage. Unless the disc is important, just chuck it away and use a new one. If the fault is with the player then again, just chuck it into the nearest electronic waste recycling bin. Spares are not available, and as it's a Sharp, diagnosis will be difficult and the fault likely to return.

Many MD players are practically worthless these days so they're often available on FreeCycle and Freegle groups: Sony are the preferred choice by far, and are also the most commonly offered brand, but take whatever is on offer without complaint and worry about problems later; after all, they are free.